X Marks the Murder (1)
Season 04, Episode 04
Air Date October 10, 1996
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X Marks the Murder (1) is the fourth episode of Diagnosis Murder's fourth season which was first broadcast on October 10, 1996.

Summary Edit

Mark, Steve investigate a string of the so-called "Casanova" murders. Dr. Sloan loses his detached perspective when the killer begins calling Mark.