Guest Stars Alan Browning as Bob Ryan Charles Hill as 2nd Guard Chris Gannon as Sidney Grainger Carl Bernard as George Adamson Frederick Peisley as Alf Waters Guy Deghy as Nathan Lottinger Norman Pitt as Arnold Stevens Joan Phillips as Helen Ryan Eric Phillips as Percy Crain Philip Lennard as Arthur Jeffries Bill Cartwright as George Birks Terence Brooks voices Joe Brierley Laurence Hepworth as Inspector Hawkins Alan Dudley as Himself (1st Guard) Ronald Mayer as 3rd Guard Gail Starforth as Miss Murphy
