| Num Episodes: | 30 |
| Last Aired: | present |
| Channel: | Oxygen |
| Company: | Jupiter Entertainment |
| Runtime: | 45 minutes |
| Cinematography: | Christopher Lane |
| Producer: | Graziano Bruni Steve Bronstein John Girod Randee Brown |
| Executive Producer: | Christopher Sgueglia Wendy Greene |
| Num Seasons: | 4 |
| Language: | English |
| Country: | United States |
| Composer: | David Starck |
| Narrated: | Laura San Giacomo |
| Director: | Chad Cunningham Seth Jarrett Christopher Mitchell |
The Mark of a Killer (or simply Mark of a Killer) is an American true crime television series currently airing on the Oxygen Network. The program examines the disturbing behaviors of serial killers. As of Season 3, the series is currently titled Mark of a Serial Killer.
Each 45 minutes-long episode follows the story of an investigation guided by the killer's postmortem signature and features first-hand accounts from detectives and prosecutors who worked on the cases, interviews with criminal psychology experts and with family members and friends of the victims or the perpetrators.[1]
The show has regular participants criminal psychologists/experts, like: Katherine Ramsland, Joni E. Johnston and Mark Safarik. Other experts are also appearing in the series for one-one episode like Michael H. Stone or Dayle Hinman.
The tenth episode is longer than the usual (1h 25 min) because it focuses on two separate killers.[6] Also there was a six-month break between the fifth and sixth episode.[7]