Dateline: Unforgettable (2021)
- Genre: Crime, Mystery, Documentary
- First Air Date: 2021-03-08
- Last Air Date: 2024-08-08
- Total Seasons: 4
- Total Episodes: 94
- Status: Returning Series
- Network: Oxygen
A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked — what their most memorable story is and why.
You can now watch Dateline: Unforgettable online on the following streaming providers in the United States.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Secret Lives | 2021-03-08 | 120 min |
| Season 1 | Episode 2 | Mystery in Orange County | 2021-03-09 | 120 min |
| Season 1 | Episode 3 | The Client | 2021-03-10 | 120 min |
| Season 1 | Episode 4 | Lauren's Promise | 2021-11-23 | 120 min |
| Season 1 | Episode 5 | The Grudge | 2021-11-30 | 120 min |
| Season 1 | Episode 6 | Conduct Unbecoming | 2021-12-14 | 120 min |
| Season 1 | Episode 7 | And Then There Were Three | 2021-12-21 | 120 min |
| Season 1 | Episode 8 | Collision | 2021-12-28 | 120 min |
| Season 1 | Episode 9 | Voices for Vanessa | 2022-01-04 | 120 min |
| Season 1 | Episode 10 | She Never Left | 2022-01-11 | 120 min |
| Season 1 | Episode 11 | Into the Night | 2022-01-18 | 120 min |
| Season 1 | Episode 12 | A Texas Twist | 2022-01-25 | 120 min |
| Season 1 | Episode 13 | At the Bottom of the Lake | 2022-02-01 | 120 min |
| Season 1 | Episode 14 | The Goldfinger Mystery | 2022-02-08 | 120 min |
| Season 1 | Episode 15 | Shannon's Story | 2022-02-22 | 120 min |
| Season 1 | Episode 16 | The Perfect Guy | 2022-03-01 | 120 min |
| Season 1 | Episode 17 | Frantic | 2022-03-15 | 120 min |
| Season 1 | Episode 18 | Finding Venus | 2022-03-22 | 120 min |
| Season 1 | Episode 19 | The Black Box | 2022-03-29 | 120 min |
| Season 1 | Episode 20 | Deliberate Evil | 2022-04-05 | 120 min |
| Season 1 | Episode 21 | At the Edge of Town | 2022-04-12 | 120 min |
| Season 1 | Episode 22 | The Interrogation | 2022-04-19 | 120 min |
| Season 1 | Episode 23 | Unchecked Evil | 2022-04-26 | 120 min |
| Season 1 | Episode 24 | Mystery at Heath Bar Farm | 2022-05-03 | 120 min |
| Season 1 | Episode 25 | The Collector | 2022-05-10 | 120 min |
| Season 2 | Episode 1 | Under the Desert Sky | 2022-05-17 | 120 min |
| Season 2 | Episode 2 | The Officer's Wife | 2022-06-14 | 120 min |
| Season 2 | Episode 3 | The Eastlake Conspiracy | 2022-06-21 | 120 min |
| Season 2 | Episode 4 | A Novel Defense | 2022-06-28 | 120 min |
| Season 2 | Episode 5 | Smoke and Mirrors | 2022-07-05 | 120 min |
| Season 2 | Episode 6 | Somebody's Daughter | 2022-07-12 | 120 min |
| Season 2 | Episode 7 | The Last Dance | 2022-07-19 | 120 min |
| Season 2 | Episode 8 | Return to the Lonely Road | 2022-07-26 | 120 min |
| Season 2 | Episode 9 | The Man Who Talked to Dogs | 2022-08-02 | 120 min |
| Season 2 | Episode 10 | Out of the Darkness | 2022-08-09 | 120 min |
| Season 2 | Episode 11 | Justice for Nikki | 2022-08-16 | 120 min |
| Season 2 | Episode 12 | House of Secrets | 2022-08-23 | 120 min |
| Season 2 | Episode 13 | The Black Widow of Lomita | 2022-10-04 | 120 min |
| Season 2 | Episode 14 | The Pink Gun Mystery | 2022-10-11 | 120 min |
| Season 2 | Episode 15 | Even the Devil Went to Church | 2022-10-18 | 120 min |
| Season 2 | Episode 16 | The Day Jennifer Disappeared | 2022-10-25 | 120 min |
| Season 2 | Episode 17 | In the Dead of Night | 2022-11-01 | 120 min |
| Season 2 | Episode 18 | A Promise to Helene | 2022-11-08 | 120 min |
| Season 2 | Episode 19 | Death of a Golden Girl | 2022-11-15 | 120 min |
| Season 2 | Episode 20 | Secrets From the Grave | 2022-11-22 | 120 min |
| Season 2 | Episode 21 | Fallen | 2022-11-29 | 120 min |
| Season 2 | Episode 22 | The Box | 2022-12-06 | 120 min |
| Season 2 | Episode 23 | The Creek | 2022-12-13 | 120 min |
| Season 2 | Episode 24 | Mystery On Blood Mountain | 2022-12-20 | 120 min |
| Season 2 | Episode 25 | The Betrayal Of Sarah Stern | 2023-07-26 | 120 min |
| Season 2 | Episode 26 | The Dead of Night | 2023-08-02 | 120 min |
| Season 2 | Episode 27 | Deadly Valentine | 2023-08-09 | 120 min |
| Season 2 | Episode 28 | Down The Back Staircase | 2023-08-16 | 120 min |
| Season 2 | Episode 29 | The Ranch | 2023-08-23 | 120 min |
| Season 2 | Episode 30 | What Happened To Amy? | 2023-08-30 | 120 min |
| Season 2 | Episode 31 | The Secret Of Spirit Lake | 2023-09-06 | 120 min |
| Season 2 | Episode 32 | The Plan | 2023-09-13 | 120 min |
| Season 2 | Episode 33 | The Haunting | 2023-09-20 | 120 min |
| Season 2 | Episode 34 | Internal Affairs | 2023-09-27 | 120 min |
| Season 2 | Episode 35 | Return to Manitowoc County | 2023-10-04 | 120 min |
| Season 2 | Episode 36 | Twisted | 2023-10-11 | 120 min |
| Season 2 | Episode 37 | Good And Evil | 2023-10-18 | 120 min |
| Season 2 | Episode 38 | The house | 2023-10-25 | 120 min |
| Season 2 | Episode 39 | Breakout | 2023-11-01 | 120 min |
| Season 2 | Episode 40 | Family Affair | 2023-11-08 | 120 min |
| Season 2 | Episode 41 | The Women and Dirty John | 2023-11-15 | 120 min |
| Season 2 | Episode 42 | Open Water | 2023-11-22 | 120 min |
| Season 2 | Episode 43 | The Silhouette | 2023-11-29 | 120 min |
| Season 2 | Episode 44 | The Sting | 2023-12-06 | 120 min |
| Season 2 | Episode 45 | Deadly Desire | 2023-12-13 | 120 min |
| Season 2 | Episode 46 | Plot twist | 2023-12-20 | 120 min |
| Season 2 | Episode 47 | The Life and Death of Princess Diana | 2023-12-27 | 120 min |
| Season 2 | Episode 48 | The Last Dive | 2024-01-03 | 120 min |
| Season 3 | Episode 1 | On a Dark, Deserted Highway | 2024-01-18 | 120 min |
| Season 3 | Episode 2 | Siren Song | 2024-01-25 | 120 min |
| Season 3 | Episode 3 | The Woman Who Couldn't Scream | 2024-02-01 | 120 min |
| Season 3 | Episode 4 | The Devil Was Watching | 2024-02-08 | 120 min |
| Season 3 | Episode 5 | Left for Dead | 2024-02-15 | 120 min |
| Season 3 | Episode 6 | Point Blank | 2024-02-22 | 120 min |
| Season 3 | Episode 7 | Complicated | 2024-02-29 | 120 min |
| Season 3 | Episode 8 | The Window | 2024-03-07 | 120 min |
| Season 3 | Episode 9 | The Evil That Watches | 2024-03-14 | 120 min |
| Season 3 | Episode 10 | The Murder of Lorenzen Wright | 2024-03-21 | 120 min |
| Season 3 | Episode 11 | A Walk in the Rain | 2024-03-28 | 120 min |
| Season 4 | Episode 1 | What Happened in Vegas | 2024-06-07 | 120 min |
| Season 4 | Episode 2 | Lonestar Obsession | 2024-06-14 | 120 min |
| Season 4 | Episode 3 | Twisted Faith | 2024-06-21 | 120 min |
| Season 4 | Episode 4 | Sex, Lies & Murder | 2024-06-28 | 120 min |
| Season 4 | Episode 5 | In A Lonely Place | 2024-07-04 | 120 min |
| Season 4 | Episode 6 | The Music Box | 2024-07-11 | 120 min |
| Season 4 | Episode 7 | Detective Story | 2024-07-18 | 120 min |
| Season 4 | Episode 8 | The Secret Life of the Homecoming Queen | 2024-07-25 | 120 min |
