Peter Firth

Robert 'Bobby' Stewart

George Sewell

Henry Stewart

Patrick Allen

Insp. Cook

Derek Newark

Mercer

Dudley Sutton

Finch

Barry Jackson

Wheeler

Christopher Malcolm

Jock

Edwin Richfield

Richard Wattis

Sir Hilary Stanton

Ambrosine Phillpotts

Lady Truesdale

Allan Cuthbertson

Gus Ashley

Arthur Hewlett

Benjy

Spencer Banks

Charlie Todd

Cynthia Lund

Susan Stewart

Candace Glendenning

Elizabeth (uncredited)