Dr. Nathaniel Grant is a pioneering organ-transplant surgeon who takes risks that other doctors would not in order to save the lives of his patients. He works closely with his ex-wife, Kate Armstrong, an organ-donor coordinator with whom he has a volatile relationship. Grant's arrogance and willingness to perform risky procedures causes him to butt heads with the hospital administration. But his main focus is on his intense relationship with his job and his patients, often at the expense of his family.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Coming Home | 2007-10-14 | 60 min |
| Season 1 | Episode 2 | After the Storm | 2007-10-21 | 60 min |
| Season 1 | Episode 3 | Breaking Free | 2007-10-28 | 60 min |
| Season 1 | Episode 4 | Taking Chances | 2007-11-04 | 60 min |
| Season 1 | Episode 5 | Best Laid Plans | 2007-12-02 | 60 min |
| Season 1 | Episode 6 | One Trick Pony | 2007-12-09 | 60 min |
| Season 1 | Episode 7 | Come What May | 2008-01-06 | 60 min |
| Season 1 | Episode 8 | Out of the Darkness | 2008-01-13 | 60 min |
| Season 1 | Episode 9 | Ghost from the Past | 2008-01-20 | 60 min |
| Season 1 | Episode 10 | Born to Run | 2008-02-03 | 60 min |
| Season 1 | Episode 11 | Thicker Than Water | 2008-02-10 | 60 min |
| Season 1 | Episode 12 | Rising from the Ashes | 2008-02-17 | 60 min |
| Season 1 | Episode 13 | Coming Together | 2008-02-24 | 60 min |
| Season 2 | Episode 1 | Ghost Horse | 2008-10-05 | 60 min |
| Season 2 | Episode 2 | Letting Go | 2008-10-12 | 60 min |
| Season 2 | Episode 3 | Gift Horse | 2008-10-19 | 60 min |
| Season 2 | Episode 4 | Dancing in the Dark | 2008-10-26 | 60 min |
| Season 2 | Episode 5 | Corporate Cowgirls | 2008-11-02 | 60 min |
| Season 2 | Episode 6 | Holding Fast | 2008-11-09 | 60 min |
| Season 2 | Episode 7 | Sweetheart of the Rodeo | 2008-11-16 | 60 min |
| Season 2 | Episode 8 | Summer's End | 2008-11-30 | 60 min |
| Season 2 | Episode 9 | Showdown! | 2008-12-07 | 60 min |
| Season 2 | Episode 10 | True Enough | 2009-01-04 | 60 min |
| Season 2 | Episode 11 | Starstruck! | 2009-01-11 | 60 min |
| Season 2 | Episode 12 | Divorce Horse | 2009-01-18 | 60 min |
| Season 2 | Episode 13 | Seismic Shifts | 2009-02-08 | 60 min |
| Season 2 | Episode 14 | Do or Die | 2009-02-15 | 60 min |
| Season 2 | Episode 15 | Dark Horse | 2009-03-01 | 60 min |
| Season 2 | Episode 16 | The Ties That Bind | 2009-03-08 | 60 min |
| Season 2 | Episode 17 | Full Circle | 2009-03-15 | 60 min |
| Season 2 | Episode 18 | Step by Step | 2009-03-22 | 60 min |
| Season 3 | Episode 1 | Miracle | 2009-10-04 | 60 min |
| Season 3 | Episode 2 | Little Secrets | 2009-10-11 | 60 min |
| Season 3 | Episode 3 | Man's Best Friend | 2009-10-18 | 60 min |
| Season 3 | Episode 4 | The Haunting of Hanley Barn | 2009-10-25 | 60 min |
| Season 3 | Episode 5 | Glory Days | 2009-11-01 | 60 min |
| Season 3 | Episode 6 | Growing Pains | 2009-11-08 | 60 min |
| Season 3 | Episode 7 | The Starting Gate | 2009-11-15 | 60 min |
| Season 3 | Episode 8 | The Fix | 2009-11-22 | 60 min |
| Season 3 | Episode 9 | Broken Arrow | 2009-11-29 | 60 min |
| Season 3 | Episode 10 | Eye of the Wolf | 2010-01-03 | 60 min |
| Season 3 | Episode 11 | Catch and Release | 2010-01-10 | 60 min |
| Season 3 | Episode 12 | The Reckoning | 2010-01-17 | 60 min |
| Season 3 | Episode 13 | Quarantine | 2010-01-24 | 60 min |
| Season 3 | Episode 14 | The Happy List | 2010-01-31 | 60 min |
| Season 3 | Episode 15 | Second Chances | 2010-03-07 | 60 min |
| Season 3 | Episode 16 | Spin Out | 2010-03-14 | 60 min |
| Season 3 | Episode 17 | Ring of Fire | 2010-03-21 | 60 min |
| Season 3 | Episode 18 | In the Cards | 2010-03-28 | 60 min |
| Season 4 | Episode 1 | Homecoming | 2010-09-26 | 60 min |
| Season 4 | Episode 2 | What Dreams May Become | 2010-10-03 | 60 min |
| Season 4 | Episode 3 | Road Curves | 2010-10-10 | 60 min |
| Season 4 | Episode 4 | Graduation | 2010-10-17 | 60 min |
| Season 4 | Episode 5 | Where the Truth Lies | 2010-10-24 | 60 min |
| Season 4 | Episode 6 | Win, Place or Show | 2010-11-07 | 60 min |
| Season 4 | Episode 7 | Jackpot! | 2010-11-14 | 60 min |
| Season 4 | Episode 8 | One Day | 2010-11-21 | 60 min |
| Season 4 | Episode 9 | Local Hero | 2010-12-05 | 60 min |
| Season 4 | Episode 10 | Mood Swings | 2011-01-02 | 60 min |
| Season 4 | Episode 11 | Family Business | 2011-01-09 | 60 min |
| Season 4 | Episode 12 | Lost Song | 2011-01-16 | 60 min |
| Season 4 | Episode 13 | The Road Home | 2011-01-23 | 60 min |
| Season 4 | Episode 14 | Leap of Faith | 2011-02-13 | 60 min |
| Season 4 | Episode 15 | The River | 2011-02-27 | 60 min |
| Season 4 | Episode 16 | Never Surrender | 2011-03-06 | 60 min |
| Season 4 | Episode 17 | Burning Down the House | 2011-03-13 | 60 min |
| Season 4 | Episode 18 | Passages | 2011-03-27 | 60 min |
| Season 5 | Episode 1 | Finding Freedom | 2011-09-18 | 60 min |
| Season 5 | Episode 2 | Something in the Night | 2011-09-25 | 60 min |
| Season 5 | Episode 3 | What's in a Name? | 2011-10-02 | 60 min |
| Season 5 | Episode 4 | Beyond Hell's Half Mile | 2011-10-16 | 60 min |
| Season 5 | Episode 5 | Never Let Go | 2011-10-23 | 60 min |
| Season 5 | Episode 6 | The Slippery Slope | 2011-10-30 | 60 min |
| Season 5 | Episode 7 | Over the Rise | 2011-11-13 | 60 min |
| Season 5 | Episode 8 | Nothing for Granted | 2011-11-20 | 60 min |
| Season 5 | Episode 9 | Cover Me | 2011-12-04 | 60 min |
| Season 5 | Episode 10 | Trust | 2012-01-08 | 60 min |
| Season 5 | Episode 11 | Fool's Gold | 2012-01-15 | 60 min |
| Season 5 | Episode 12 | Road to Nowhere | 2012-01-22 | 60 min |
| Season 5 | Episode 13 | Aftermath | 2012-02-12 | 60 min |
| Season 5 | Episode 14 | Working on a Dream | 2012-02-26 | 60 min |
| Season 5 | Episode 15 | Breaking Down and Building Up | 2012-03-04 | 60 min |
| Season 5 | Episode 16 | Wild Horses | 2012-03-11 | 60 min |
| Season 5 | Episode 17 | True Calling | 2012-03-18 | 60 min |
| Season 5 | Episode 18 | Candles in the Wind | 2012-03-25 | 60 min |
| Season 6 | Episode 1 | Running Against the Wind | 2012-09-16 | 60 min |
| Season 6 | Episode 2 | Crossed Signals | 2012-09-23 | 60 min |
| Season 6 | Episode 3 | Keeping Up Appearances | 2012-09-30 | 60 min |
| Season 6 | Episode 4 | The Natural | 2012-10-07 | 60 min |
| Season 6 | Episode 5 | Trial Run | 2012-10-28 | 60 min |
| Season 6 | Episode 6 | Helping Hands | 2012-11-04 | 60 min |
| Season 6 | Episode 7 | Life is a Highway | 2012-11-11 | 60 min |
| Season 6 | Episode 8 | Do the Right Thing | 2012-12-02 | 60 min |
| Season 6 | Episode 9 | Great Expectations | 2012-12-09 | 60 min |
| Season 6 | Episode 10 | The Road Ahead | 2013-01-06 | 60 min |
| Season 6 | Episode 11 | Blowing Smoke | 2013-01-13 | 60 min |
| Season 6 | Episode 12 | Playing with Fire | 2013-01-20 | 60 min |
| Season 6 | Episode 13 | Waiting for Tomorrow | 2013-02-10 | 60 min |
| Season 6 | Episode 14 | Lost and Gone Forever | 2013-02-17 | 60 min |
| Season 6 | Episode 15 | After All We've Been Through | 2013-03-03 | 60 min |
| Season 6 | Episode 16 | Born to Buck | 2013-03-24 | 60 min |
| Season 6 | Episode 17 | Breaking Point | 2013-03-31 | 60 min |
| Season 6 | Episode 18 | Under Pressure | 2013-04-07 | 60 min |
| Season 7 | Episode 1 | Picking Up the Pieces | 2013-10-06 | 60 min |
| Season 7 | Episode 2 | Living the Moment | 2013-10-13 | 60 min |
| Season 7 | Episode 3 | Wrecking Ball | 2013-10-20 | 60 min |
| Season 7 | Episode 4 | The Penny Drops | 2013-10-27 | 60 min |
| Season 7 | Episode 5 | Thread the Needle | 2013-11-03 | 60 min |
| Season 7 | Episode 6 | Now or Never | 2013-11-10 | 60 min |
| Season 7 | Episode 7 | Best Man | 2013-11-17 | 60 min |
| Season 7 | Episode 8 | Hotshot | 2013-12-01 | 60 min |
| Season 7 | Episode 9 | There But for Fortune | 2013-12-08 | 60 min |
| Season 7 | Episode 10 | Darkness and Light | 2014-01-12 | 60 min |
| Season 7 | Episode 11 | Better Days | 2014-01-19 | 60 min |
| Season 7 | Episode 12 | Walking Tall | 2014-01-26 | 60 min |
| Season 7 | Episode 13 | Lost Highway | 2014-03-09 | 60 min |
| Season 7 | Episode 14 | Things We Lost | 2014-03-16 | 60 min |
| Season 7 | Episode 15 | Smoke ‘n' Mirrors | 2014-03-23 | 60 min |
| Season 7 | Episode 16 | The Comeback Kid | 2014-03-30 | 60 min |
| Season 7 | Episode 17 | On the Line | 2014-04-06 | 60 min |
| Season 7 | Episode 18 | Be Careful What You Wish For | 2014-04-13 | 60 min |
| Season 8 | Episode 1 | There and Back Again | 2014-09-28 | 60 min |
| Season 8 | Episode 2 | The Big Red Wall | 2014-10-05 | 60 min |
| Season 8 | Episode 3 | Severed Ties | 2014-10-12 | 60 min |
| Season 8 | Episode 4 | Secrets and Lies | 2014-10-19 | 60 min |
| Season 8 | Episode 5 | Endings and Beginnings | 2014-10-26 | 60 min |
| Season 8 | Episode 6 | Steal Away | 2014-11-02 | 60 min |
| Season 8 | Episode 7 | Walk a Mile | 2014-11-09 | 60 min |
| Season 8 | Episode 8 | The Family Tree | 2014-11-23 | 60 min |
| Season 8 | Episode 9 | The Pike River Cull | 2014-12-07 | 60 min |
| Season 8 | Episode 10 | The Heart of a River | 2015-01-11 | 60 min |
| Season 8 | Episode 11 | The Silent Partner | 2015-01-18 | 60 min |
| Season 8 | Episode 12 | Broken Heartland | 2015-02-01 | 60 min |
| Season 8 | Episode 13 | Cowgirls Don't Cry | 2015-02-15 | 60 min |
| Season 8 | Episode 14 | Riders on the Storm | 2015-03-01 | 60 min |
| Season 8 | Episode 15 | Eclipse of the Heart | 2015-03-08 | 60 min |
| Season 8 | Episode 16 | Faking It | 2015-03-15 | 60 min |
| Season 8 | Episode 17 | All I Need is You | 2015-03-22 | 60 min |
| Season 8 | Episode 18 | Written in Stone | 2015-03-29 | 60 min |
| Season 9 | Episode 1 | Brave New World | 2015-10-04 | 60 min |
| Season 9 | Episode 2 | Begin Again | 2015-10-11 | 60 min |
| Season 9 | Episode 3 | Riding for a Fall | 2015-10-18 | 60 min |
| Season 9 | Episode 4 | Ties of the Earth | 2015-10-25 | 60 min |
| Season 9 | Episode 5 | Back in the Saddle | 2015-11-01 | 60 min |
| Season 9 | Episode 6 | Over and Out | 2015-11-08 | 60 min |
| Season 9 | Episode 7 | Fearless | 2015-11-15 | 60 min |
| Season 9 | Episode 8 | Reckless Abandon | 2015-11-22 | 60 min |
| Season 9 | Episode 9 | A Matter of Trust | 2015-12-06 | 60 min |
| Season 9 | Episode 10 | Darkness Before Dawn | 2016-01-10 | 60 min |
| Season 9 | Episode 11 | Making the Grade | 2016-01-17 | 60 min |
| Season 9 | Episode 12 | The Real Deal | 2016-01-24 | 60 min |
| Season 9 | Episode 13 | Risky Business | 2016-02-07 | 60 min |
| Season 9 | Episode 14 | No Regrets | 2016-02-14 | 60 min |
| Season 9 | Episode 15 | Making a Move | 2016-02-21 | 60 min |
| Season 9 | Episode 16 | Pandora's Box | 2016-03-06 | 60 min |
| Season 9 | Episode 17 | Love is Just a Word | 2016-03-13 | 60 min |
| Season 9 | Episode 18 | Resolutions | 2016-03-20 | 60 min |
| Season 10 | Episode 1 | There Will Be Changes | 2016-10-02 | 60 min |
| Season 10 | Episode 2 | You Just Know | 2016-10-09 | 60 min |
| Season 10 | Episode 3 | New Kid in Town | 2016-10-16 | 60 min |
| Season 10 | Episode 4 | New Horizons | 2016-10-23 | 60 min |
| Season 10 | Episode 5 | Something to Prove | 2016-10-30 | 60 min |
| Season 10 | Episode 6 | The Green-Eyed Monster | 2016-11-06 | 60 min |
| Season 10 | Episode 7 | Riding Shotgun | 2016-11-13 | 60 min |
| Season 10 | Episode 8 | Here and Now | 2016-11-20 | 60 min |
| Season 10 | Episode 9 | A Horse with No Rider | 2016-12-04 | 60 min |
| Season 10 | Episode 10 | Together and Apart | 2017-01-15 | 60 min |
| Season 10 | Episode 11 | Change of Course | 2017-01-22 | 60 min |
| Season 10 | Episode 12 | Sound of Silence | 2017-02-05 | 60 min |
| Season 10 | Episode 13 | Home Sweet Home | 2017-02-12 | 60 min |
| Season 10 | Episode 14 | Written in the Stars | 2017-02-19 | 60 min |
| Season 10 | Episode 15 | Forest for the Trees | 2017-03-05 | 60 min |
| Season 10 | Episode 16 | A Long Shot | 2017-03-12 | 60 min |
| Season 10 | Episode 17 | Dreamer | 2017-03-19 | 60 min |
| Season 10 | Episode 18 | Greater Expectations | 2017-03-26 | 60 min |
| Season 11 | Episode 1 | Baby on Board | 2017-09-24 | 60 min |
| Season 11 | Episode 2 | Highs and Lows | 2017-10-01 | 60 min |
| Season 11 | Episode 3 | Decision Time | 2017-10-08 | 60 min |
| Season 11 | Episode 4 | Hard to Say Goodbye | 2017-10-15 | 60 min |
| Season 11 | Episode 5 | Measuring Up | 2017-10-22 | 60 min |
| Season 11 | Episode 6 | Strange Bedfellows | 2017-11-05 | 60 min |
| Season 11 | Episode 7 | Our Sons and Daughters | 2017-11-12 | 60 min |
| Season 11 | Episode 8 | Truth Be Told | 2017-11-19 | 60 min |
| Season 11 | Episode 9 | Challenges | 2017-12-03 | 60 min |
| Season 11 | Episode 10 | A Fine Balance | 2018-01-07 | 60 min |
| Season 11 | Episode 11 | Somewhere in Between | 2018-01-14 | 60 min |
| Season 11 | Episode 12 | Out of the Shadow | 2018-01-21 | 60 min |
| Season 11 | Episode 13 | Reunion | 2018-01-28 | 60 min |
| Season 11 | Episode 14 | Past Imperfect | 2018-02-04 | 60 min |
| Season 11 | Episode 15 | Strength of Bonds | 2018-03-11 | 60 min |
| Season 11 | Episode 16 | A Place to Call Home | 2018-03-18 | 60 min |
| Season 11 | Episode 17 | Doubt | 2018-04-01 | 60 min |
| Season 11 | Episode 18 | Naming Day | 2018-04-08 | 60 min |
| Season 12 | Episode 1 | Dare to Dream | 2019-01-06 | 60 min |
| Season 12 | Episode 2 | Hearts Run Free | 2019-01-13 | 60 min |
| Season 12 | Episode 3 | Just Breathe | 2019-01-20 | 60 min |
| Season 12 | Episode 4 | Risk and Reward | 2019-01-27 | 60 min |
| Season 12 | Episode 5 | Change of Heart | 2019-02-10 | 60 min |
| Season 12 | Episode 6 | Diamond in the Rough | 2019-02-17 | 60 min |
| Season 12 | Episode 7 | Running Scared | 2019-03-03 | 60 min |
| Season 12 | Episode 8 | Stress Fractures | 2019-03-10 | 60 min |
| Season 12 | Episode 9 | Long Road Back | 2019-03-24 | 60 min |
| Season 12 | Episode 10 | All Hearts Lead Home | 2019-03-31 | 60 min |
| Season 12 | Episode 11 | Room to Grow | 2019-04-07 | 60 min |
| Season 13 | Episode 1 | Snakes and Ladders | 2019-09-22 | 60 min |
| Season 13 | Episode 2 | Wild One | 2019-09-29 | 60 min |
| Season 13 | Episode 3 | Rearview Mirror | 2019-10-06 | 60 min |
| Season 13 | Episode 4 | The Eye of the Storm | 2019-10-13 | 60 min |
| Season 13 | Episode 5 | Fairytale | 2019-10-20 | 60 min |
| Season 13 | Episode 6 | A Time to Remember | 2019-10-27 | 60 min |
| Season 13 | Episode 7 | The Art of Trust | 2019-11-03 | 60 min |
| Season 13 | Episode 8 | Legacy | 2019-11-10 | 60 min |
| Season 13 | Episode 9 | Fight or Flight | 2019-11-17 | 60 min |
| Season 13 | Episode 10 | The Passing of the Torch | 2019-11-24 | 60 min |
| Season 14 | Episode 1 | Keep Me in Your Heart | 2021-01-10 | 60 min |
| Season 14 | Episode 2 | The Last Goodbye | 2021-01-17 | 60 min |
| Season 14 | Episode 3 | Making Amends | 2021-01-24 | 60 min |
| Season 14 | Episode 4 | Through the Smoke | 2021-01-31 | 60 min |
| Season 14 | Episode 5 | Outsiders | 2021-02-14 | 60 min |
| Season 14 | Episode 6 | The New Normal | 2021-02-21 | 60 min |
| Season 14 | Episode 7 | Courage | 2021-02-28 | 60 min |
| Season 14 | Episode 8 | Changing Gears | 2021-03-07 | 60 min |
| Season 14 | Episode 9 | Find Me in the Dark | 2021-03-14 | 60 min |
| Season 14 | Episode 10 | Staying the Course | 2021-03-21 | 60 min |
| Season 15 | Episode 1 | Moving Toward the Light | 2021-10-17 | 60 min |
| Season 15 | Episode 2 | Runaway | 2021-10-24 | 60 min |
| Season 15 | Episode 3 | Bad Moon Rising | 2021-10-31 | 60 min |
| Season 15 | Episode 4 | Sins of the Father | 2021-11-07 | 60 min |
| Season 15 | Episode 5 | Blood and Water | 2021-11-14 | 60 min |
| Season 15 | Episode 6 | Happy Ever After | 2021-11-21 | 60 min |
| Season 15 | Episode 7 | Bluebird | 2021-11-28 | 60 min |
| Season 15 | Episode 8 | Brand New Day | 2021-12-05 | 60 min |
| Season 15 | Episode 9 | The Long Game | 2021-12-12 | 60 min |
| Season 15 | Episode 10 | Leaving a Legacy | 2021-12-19 | 60 min |
| Season 16 | Episode 1 | Something's Got to Give | 2022-10-02 | 60 min |
| Season 16 | Episode 2 | Changes | 2022-10-09 | 60 min |
| Season 16 | Episode 3 | On the Ropes | 2022-10-16 | 60 min |
| Season 16 | Episode 4 | Spark to Flame | 2022-10-23 | 60 min |
| Season 16 | Episode 5 | Higher Ground | 2022-10-30 | 60 min |
| Season 16 | Episode 6 | Into the Wild | 2022-11-06 | 60 min |
| Season 16 | Episode 7 | Vigil | 2022-11-13 | 60 min |
| Season 16 | Episode 8 | Running Down a Dream | 2022-11-20 | 60 min |
| Season 16 | Episode 9 | True Colours, New Tricks | 2022-11-27 | 60 min |
| Season 16 | Episode 10 | Lurking in the Shadows | 2022-12-04 | 60 min |
| Season 16 | Episode 11 | Head Over Heels | 2023-01-08 | 60 min |
| Season 16 | Episode 12 | Memory | 2023-01-15 | 60 min |
| Season 16 | Episode 13 | Striking a Balance | 2023-01-22 | 60 min |
| Season 16 | Episode 14 | Learning to Fly | 2023-01-29 | 60 min |
| Season 16 | Episode 15 | A Light in the Dark | 2023-02-05 | 60 min |
| Season 17 | Episode 1 | The Path Less Traveled | 2023-10-01 | 60 min |
| Season 17 | Episode 2 | Taking the Reins | 2023-10-08 | 60 min |
| Season 17 | Episode 3 | The Heart Wants | 2023-10-15 | 60 min |
| Season 17 | Episode 4 | A Piece Apart | 2023-10-22 | 60 min |
| Season 17 | Episode 5 | How to Say Goodbye | 2023-10-29 | 60 min |
| Season 17 | Episode 6 | Heat of the Moment | 2023-11-05 | 60 min |
| Season 17 | Episode 7 | Unknown Caller | 2023-11-12 | 60 min |
| Season 17 | Episode 8 | Harmony | 2023-11-19 | 60 min |
| Season 17 | Episode 9 | Fear is a Liar | 2023-11-26 | 60 min |
| Season 17 | Episode 10 | Just the Beginning | 2023-12-03 | 60 min |
| Season 18 | Episode 1 | True Grit | 2024-10-06 | 60 min |
| Season 18 | Episode 2 | Bird's Eye View | 2024-10-06 | 60 min |
| Season 18 | Episode 3 | You Can Lead a Horse to Water | 2024-10-20 | 60 min |
| Season 18 | Episode 4 | Into the Unknown | 2024-10-27 | 60 min |
| Season 18 | Episode 5 | Fork in the Road | 2024-11-03 | 60 min |
| Season 18 | Episode 6 | Sisters | 2024-11-10 | 60 min |
| Season 18 | Episode 7 | World on a String | 2024-11-17 | 60 min |
| Season 18 | Episode 8 | Throwing Your Hat in the Ring | 2024-11-24 | 60 min |
| Production | David Hollander | Executive Producer |
