Jeff Randall and Marty Hopkirk are private investigators but Marty is run down one day and killed.

Jeff Randall is confined to his bed.

Jean Hopkirk is the subject of some strange psychic phenomena when efforts are made to persuade her that her late husband is trying to contact her.

It's hard to trust a ghost when he says he has seen a murder and that the victim is still alive; Jeff Randall doesn't know what to believe when his ghost detective partner, Marty Hopkirk, repeatedly reports dramatic events.

Death comes to one member of a mind-reading act; when reaching the Russian Roulette part of the show, one cartridge is live.

Aristocrat Harold Pargiter and his Lords rob the British vault for a document proving that his family titles and deeds were stolen by King John in the 13th century and his succession to the throne.