Mark of a Killer (2019)
- Genre: Documentary, Crime
- First Air Date: 2019-01-20
- Last Air Date: 2022-04-23
- Total Seasons: 4
- Total Episodes: 34
- Status: Returning Series
- Episode Runtime: 43 min.
- Production Country: United States of America
All serial killers commit murder to satisfy their grand fantasies, but the murderers featured in this true-crime docuseries take it one step further, committing heinous acts that allow them to extend their fantasies and relive the excitement of their crimes again and again.
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| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Posed to Kill | 2019-01-20 | 60 min |
| Season 1 | Episode 2 | The Last Call Killer | 2019-01-27 | 60 min |
| Season 1 | Episode 3 | An Eye for Murder | 2019-02-10 | 60 min |
| Season 1 | Episode 4 | Pattern of Murder | 2019-02-17 | 60 min |
| Season 1 | Episode 5 | Momentos of Murder | 2019-02-24 | 60 min |
| Season 1 | Episode 6 | An Appetite for Murder | 2019-03-03 | 60 min |
| Season 2 | Episode 1 | Killer Caller | 2020-04-09 | 60 min |
| Season 2 | Episode 2 | Deadly Summer | 2020-04-16 | 60 min |
| Season 2 | Episode 3 | Deadly Design | 2020-04-23 | 60 min |
| Season 2 | Episode 4 | The Other Zodiac | 2020-04-30 | 60 min |
| Season 2 | Episode 5 | The Smell of Death | 2020-05-07 | 60 min |
| Season 2 | Episode 6 | Hunted to Death | 2020-05-16 | 60 min |
| Season 2 | Episode 7 | Collar and Leash Killer | 2020-05-23 | 60 min |
| Season 2 | Episode 8 | Killer Athlete | 2020-05-30 | 60 min |
| Season 2 | Episode 9 | Bound to Kill | 2020-06-06 | 60 min |
| Season 2 | Episode 10 | Keys to a Killer | 2020-06-13 | 60 min |
| Season 3 | Episode 1 | The I-40 Killer | 2021-04-12 | 60 min |
| Season 3 | Episode 2 | The I-95 Killer | 2021-04-13 | 60 min |
| Season 3 | Episode 3 | The Charmer | 2021-04-14 | 60 min |
| Season 3 | Episode 4 | The Englewood Killer | 2021-04-15 | 60 min |
| Season 3 | Episode 5 | Classified to Kill | 2021-04-16 | 60 min |
| Season 3 | Episode 6 | The Interstate Killer | 2021-10-17 | 60 min |
| Season 3 | Episode 7 | The Grim Sleeper | 2021-10-24 | 60 min |
| Season 3 | Episode 8 | The Tourniquet Killer | 2021-10-31 | 60 min |
| Season 3 | Episode 9 | Deaths in the Desert | 2021-10-31 | 60 min |
| Season 3 | Episode 10 | Summer of Fear | 2021-11-07 | 60 min |
| Season 3 | Episode 11 | The Monster | 2022-04-02 | 60 min |
| Season 3 | Episode 12 | The Bayou Strangler | 2022-04-09 | 60 min |
| Season 3 | Episode 13 | The Skull Crusher | 2022-04-16 | 60 min |
| Season 3 | Episode 14 | The D.C. Sniper | 2022-04-23 | 60 min |
