Play Your Hunch
Synopsis
Billed as "the show to keep you guessing", this was the UK version of the 1958-vintage US quiz. Two married couples were invited to use observation and deduction to choose which of three options (X, Y or Z) was the correct solution to a given problem. Usually, this involved other people of which only one was genuine, in a style similar to Tell the Truth.
Theme music
The XYZ band were on hand to provide the accompaniment.
Inventor
Devised by Mark Goodson and Bill Todman.