Brian Elliot, a friend of Ch. Insp. Conway, has been robbed by a prostitute and her accomplice, but does not help the investigation when he refuses to make a formal statement or testify in case his wife finds out about his indiscretion. CID launch an undercover sting, which fails, but Elliot arrives at the station with his wife to make a statement, and it is quite clear she knows the truth. (thetvdb.com)