Characters played by Douglass Montgomery
Jim Harding
Characters played by Hazel Court
Jeannie Thompson
Characters played by Patricia Burke
Diana Harding
Characters played by Garry Marsh
Jerry Burns
Characters played by Ronald Shiner
Dan Collins
Characters played by Eliot Makeham
Pop Thompson
Characters played by Kenneth Griffith
Johnny
Characters played by Frederick Leister
Dr. Franklin
Characters played by Richard Bird
Jennings
Characters played by Andrew Cruickshank
Inspector Baxter
Characters played by Michael Medwin
Cabby
Characters played by Peggy Ann Clifford
Millie
Characters played by William Douglas
Lawson
Characters played by Dennis Harkin
Bert
Characters played by Peter Jones
Pete
Characters played by Dora Sevening
Mrs. Franklin
Characters played by Erik Chitty
Schofield
Characters played by Audrey Teesdale
Ethel
Characters played by Mark Stone
Critic
Characters played by Sam Kydd
Joe
Characters played by Eric Whittle
Alec
Characters played by John Adams
Police Constable
Characters played by Bill Fraser
Railway Porter
Characters played by Duncan Lewis
Roberts
Characters played by Andreas Malandrinos
Cafe Owner
Characters played by Jack May
Onlooker at 'Professor Harding' Demonstration
Characters played by Arthur Mullard
Doorman at Restaurant
Characters played by Frank Phillips
BBC Newsreader
Characters played by Gillian Watt
The Girl