A couple live in an old, isolated mansion. The husband's murderous, insane twin escapes from a lunatic asylum. The cops haul off the wrong twin and the wife is stuck with the killer.
Where to Watch Mark of Cain
Cast of Mark of Cain
Robin WardSean O'Brien / Michael O'Brien
Wendy CrewsonDale
Antony ParrDr. Clifford
August SchellenbergOtto
Deborah GroverMolly
Cynthia KerelukNurse
Kate ParrGirl
Gert PeckertDoctor
Douglas RichardsonVictim
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