Checkmate

The Paper Killer (1x25)

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Steve Margate is a highly successful comic strip artist who plans to kill off his title character, O'Hara. Someone is trying to make Margate appear legally incompetent by appearing before him donned as O'Hara and apparently trying to kill him when he is alone, and Checkmate suspects it is someone who stands to take over the strip and all its financial benefits with Margate out of the way.