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A scientist conducting cancer research is convinced that his test monkey was not only stolen but replaced. He is later found dead from gas, and Colonel March must prove if it was suicide or not.
Colonel March of Scotland Yard
Season 1
12
June 27, 1956
27 minutes
Patrick Barr
Horton
Alfred Burke
Minister
Patricia Laffan
Jane
Michael Alexander
Dr. Walker
Bernard Knowles
Director
Arthur Crabtree
Director