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In today's story, the armchair detectives attempt to identify the killer when a successful inventor's body is found in his workshop. Has a friend, colleague or rival inventor committed the deadly crime?
First Air Date : Nov 20, 2017
Last Air date : Dec 15, 2017
Episode : 20 Episode
Season : 1 Season
Runtime: 44:14 minutes
Studio: BBC One
Country: United Kingdom
Crew: