Seven Keys
Plot: Alan Dobie plays a convict who is bequeathed a set of seven keys by a fellow prisoner. After discovering that the deceased was an embezzler who stole £20,000 that was never recovered; he sets out to find the cash after finishing the last three months of his sentence

Jeannie Carson
Alan Dobie
Delphi Lawrence
John Carson
John Lee
Anthony Nicholls
Robertson Hare
Fabia Drake
Alan White
Colin Gordon
Peter Barkworth
Jeremy Lloyd
John Horsley