Characters played by Walter Pidgeon
Maj. Hugh 'Bulldog' Drummond
Characters played by Margaret Leighton
Sgt. Helen Smith
Characters played by Robert Beatty
Arthur Gunns
Characters played by David Tomlinson
Algernon 'Algy' Longworth
Characters played by Peggy Evans
Molly
Characters played by Charles Victor
Insp. McIver
Characters played by Bernard Lee
Col. Webson
Characters played by James Hayter
Bill
Characters played by Patric Doonan
Alec
Characters played by Michael Allan
Bert
Characters played by Frank Andrews
Harry - Policeman in Park
Characters played by Richard Caldicot
Judge
Characters played by Ivan Craig
Air traffic controller
Characters played by Anthony Forwood
Pilot
Characters played by John Gabriel
Heckler in crowd
Characters played by Arthur Hewlett
Department Store manager who raises the alarm
Characters played by Arthur Howard
McIver's Assistant
Characters played by Noel Johnson
Detective
Characters played by Richard Johnson
Control Tower Operator
Characters played by Harold Lang
Stan
Characters played by Arthur Lovegrove
Nightwatchman
Characters played by Pat McGrath
Crook
Characters played by Laurence Naismith
Hardcastle
Card player
Characters played by Jim O'Brady
Customer in Last Word Club
Characters played by Cyril Smith
Man at nightclub bar
Characters played by Michael Ward
Hairdresser
Characters played by Russell Waters
Ex-service Men Collector
Characters played by George Wilson
Minor Role