"Mark of a Killer" examines the disturbing behaviors of serial killers.
Trailer - 1 min 54 sec
"Mark of a Killer" examines the disturbing behaviors of serial killers.Mark of a Killer is a series that is currently running and has 3 seasons (21 episodes). The series first aired on January 20, 2019.Mark of a Killer is available for streaming on the Oxygen website, both individual episodes and full seasons. You can also watch Mark of a Killer on demand at Amazon, Hulu, Vudu, FuboTV and Apple TV.