Episodes 4
1
Murder Must Advertise 1
November 30, 1973
A man working at the Pym's Publicity agency falls to his death. Lord Peter decides to go under cover at Pym's publicity to find out who killed Victor Dean.
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2
Murder Must Advertise 2
December 7, 1973
• 50m
Lord Peter attends a fancy dress party and learns the details of a drug ring.
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3
Murder Must Advertise 3
December 14, 1973
• 50m
Lord Peter discovers that Dean's girl friend has a drug habit and decides to take on a further alter ego - as his own cousin.
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4
Murder Must Advertise 4
Season Finale
December 21, 1973
• 50m
There are already two dead bodies and Lord Peter may soon be the third as it becomes clear that the gang smuggling drugs is using the advertising agency in a complex plan to deflect suspicion.
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