Characters played by Gene Nelson
Mike Delaney
Characters played by Faith Domergue
Jill Rabowski
Characters played by Joseph Tomelty
Detective Inspector Cleary
Characters played by Leonard Williams
Detective Sergeant Haines
Characters played by Barry MacKay
Inspector Hammond
Characters played by Peter Arne
Dr. Stephen Rayner
Jarvis
Characters played by Martin Wyldeck
Dr. Preston
Characters played by Mary Jones
Sister Brown
Characters played by Philip Dale
Dr. Peters
Characters played by Carl Jaffe
Dr. Marks
Characters played by Patricia Driscoll
X-Ray Assistant
Characters played by Philippa Hiatt
X-Ray Assistant
Characters played by Gordon Bell
Assistant Surgeon
Characters played by Ian Cooper
Anaesthetist
Characters played by Vanda Godsell
Stenographer
Characters played by Launce Maraschal
Alcott
the Editor
Characters played by Charles Hawtrey
Office Boy
Characters played by Vic Perry
Emmanuel Vasquo
Characters played by Paul Hardtmuth
Dr. Bressler
Characters played by Dervis Ward
Allegan
Characters played by Donald Gray
Robert Maitland
Characters played by Anthony Woodruff
Nuclear Physicist
Characters played by Brian O'Higgins
Pat the Barman
Characters played by Roland Brand
Minor role
Characters played by Susan Chester
Minor role
Characters played by Vic Heath
Minor role
Characters played by Percy Herbert
Assassin
Characters played by William Lucas
X-Ray Technician
Characters played by Muriel Young
Minor role