Three part series detailing the dangerous prehistoric creatures humans met as they explored the world for the first time.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Sleeper Cells | 2009-07-01 | 60 min |
| Season 1 | Episode 2 | Outbreak | 2009-07-08 | 60 min |
| Season 1 | Episode 3 | Sex Maniacs | 2009-07-15 | 60 min |
| Season 1 | Episode 4 | Masters of Disguise | 2009-07-22 | 60 min |
| Season 1 | Episode 5 | Hijackers | 2009-07-29 | 60 min |
| Season 1 | Episode 6 | Living with the Enemy | 2009-08-05 | 60 min |
| Season 2 | Episode 1 | Suicide Attackers | 2010-06-09 | 60 min |
| Season 2 | Episode 2 | Feeding Frenzy | 2010-06-16 | 60 min |
| Season 2 | Episode 3 | Cold Blooded Killers | 2010-06-23 | 60 min |
| Season 2 | Episode 4 | Lurkers | 2010-07-07 | 60 min |
| Season 2 | Episode 5 | Flesh Eaters | 2010-07-14 | 60 min |
| Season 2 | Episode 6 | Stowaways | 2010-07-28 | 60 min |
| Season 2 | Episode 7 | Breeders | 2010-08-04 | 60 min |
| Season 2 | Episode 8 | Double Agents | 2010-08-11 | 60 min |
| Season 2 | Episode 9 | Homegrown Enemies | 2010-08-18 | 60 min |
| Season 2 | Episode 10 | Shape Shifters | 2010-08-25 | 60 min |
| Season 3 | Episode 1 | My Child Will Only Eat Cat Food | 2012-10-05 | 60 min |
| Season 3 | Episode 2 | Something's Eating My Son Inside Out | 2012-10-12 | 60 min |
| Season 3 | Episode 3 | My Face-Eating Parasite | 2012-10-19 | 60 min |
| Season 3 | Episode 4 | My Daughter is Losing Her Mind | 2012-10-26 | 60 min |
| Season 3 | Episode 5 | Something's Eating My Dreams | 2012-11-02 | 60 min |
| Season 3 | Episode 6 | A Monster's Taking My Baby | 2012-11-09 | 60 min |
| Season 3 | Episode 7 | I Coughed Up Worms! | 2012-11-16 | 60 min |
| Season 3 | Episode 8 | My Brain Has Been Hijacked | 2012-11-23 | 60 min |
| Season 3 | Episode 9 | You Left What Inside Me? | 2012-11-30 | 60 min |
| Season 3 | Episode 10 | Killer in My Neck | 2012-12-07 | 60 min |
| Season 4 | Episode 1 | The Flesh-Eating Monster | 2013-09-30 | 60 min |
| Season 4 | Episode 2 | There's a Worm in My Eye | 2013-10-07 | 60 min |
| Season 4 | Episode 3 | Choosing Between Life and Limb | 2013-10-11 | 60 min |
| Season 4 | Episode 4 | It Came from a Tick... | 2013-10-18 | 60 min |
| Season 4 | Episode 5 | My Husband is Hallucinating | 2013-10-25 | 60 min |
| Season 4 | Episode 6 | Dying Abroad | 2013-12-11 | 60 min |
| Season 4 | Episode 7 | Maggots Are Eating Me Alive | 2013-12-11 | 60 min |
| Season 4 | Episode 8 | A Deadly Swim | 2013-12-18 | 60 min |
| Season 4 | Episode 9 | My Christmas from Hell | 2013-12-18 | 60 min |
| Season 4 | Episode 10 | I Almost Killed My Baby | 2013-12-18 | 60 min |
| Season 5 | Episode 1 | My Daughter's Going Crazy | 2014-10-09 | 60 min |
| Season 5 | Episode 2 | West Nile Attack | 2014-10-16 | 60 min |
| Season 5 | Episode 3 | A Menace in My Own Backyard | 2014-10-23 | 60 min |
| Season 5 | Episode 4 | The Killer in the Lake | 2014-11-06 | 60 min |
| Season 5 | Episode 5 | There's a Worm Crawling in My What? | 2014-11-13 | 60 min |
| Season 5 | Episode 6 | Vampire Parasites Attack | 2014-11-20 | 60 min |
| Season 5 | Episode 7 | A Holiday in the Hospital | 2014-12-04 | 60 min |
| Season 5 | Episode 8 | My Body is Rotting | 2014-12-11 | 60 min |
| Season 5 | Episode 9 | The Brain Colonizer | 2014-12-11 | 60 min |
| Season 5 | Episode 10 | I Smell Like Death | 2014-12-18 | 60 min |
| Season 6 | Episode 1 | There's Something Living in My Knee?! | 2015-10-29 | 60 min |
| Season 6 | Episode 2 | Help! My Son is a Leper | 2015-10-29 | 60 min |
| Season 6 | Episode 3 | My Vacation from Hell | 2015-11-05 | 60 min |
| Season 6 | Episode 4 | There's a Fungus in My What!?! | 2015-11-05 | 60 min |
| Season 6 | Episode 5 | Worms Are Eating My Lungs | 2015-11-12 | 60 min |
| Season 6 | Episode 6 | An Amoeba is Eating My Brain | 2015-11-19 | 60 min |
| Season 6 | Episode 7 | The Eyeball Eater | 2015-12-03 | 60 min |
| Season 6 | Episode 8 | The Backyard Killer | 2015-12-10 | 60 min |
| Season 6 | Episode 9 | All I Got for Christmas is Brain Surgery | 2015-12-17 | 60 min |
| Season 6 | Episode 10 | They Hijacked My Eyeball | 2015-12-22 | 60 min |
| Season 7 | Episode 1 | Backyard Killers | 2016-10-06 | 60 min |
| Season 7 | Episode 2 | I Have a What in My What? | 2016-10-13 | 60 min |
| Season 7 | Episode 3 | There's Something Living in My Hand! | 2016-10-20 | 60 min |
| Season 7 | Episode 4 | My Wife is Rotting | 2016-10-27 | 60 min |
| Season 7 | Episode 5 | My Hands Are Falling Off | 2016-11-03 | 60 min |
| Season 7 | Episode 6 | My Evil Twin is Driving Me Crazy | 2016-11-10 | 60 min |
| Season 7 | Episode 7 | Holiday From Hell | 2016-12-15 | 60 min |
| Season 8 | Episode 1 | Help! I'm Being Eaten Alive | 2017-10-15 | 60 min |
| Season 8 | Episode 2 | My Brain Is Under Attack | 2017-10-15 | 60 min |
| Season 8 | Episode 3 | My Second Brain Is Killing Me | 2017-10-22 | 60 min |
| Season 8 | Episode 4 | The Monster In My Mouth | 2017-10-29 | 60 min |
| Season 8 | Episode 5 | There's a Maggot in My Head | 2017-11-05 | 60 min |
| Season 8 | Episode 6 | Something Is Eating My Baby | 2017-11-12 | 60 min |
| Season 8 | Episode 7 | Braced for Death | 2017-11-19 | 60 min |
| Season 8 | Episode 8 | I Can't Stop Coughing Up Blood | 2017-11-26 | 60 min |
| Season 8 | Episode 9 | The Organ Shredder | 2017-12-03 | 60 min |
| Season 8 | Episode 10 | My Lungs Are Rotting | 2017-12-10 | 60 min |
| Season 8 | Episode 11 | All I Got for Christmas | 2017-12-17 | 60 min |
| Season 8 | Episode 12 | There Are Twigs In My Urine | 2017-12-17 | 60 min |
