Randall and Hopkirk (Deceased) (1969)

That's How Murder Snowballs (1x5)

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The highlight of the mindreading act of Fernandez and Abel is a blank cartridge placed in a revolver, then the correct chamber containing the cartidge predicted. This time, the cartridge isn't blank, it's real--and Abel fatally shoots his partner. Jeff, who was in attendance at the fatal show, gets a job as a solo mind-reader (thanks to his ghostly partner) to try to find out who was responsible for putting the real bullet in Abel's gun.