Peter Firth

Robert 'Bobby' Stewart

George Sewell

Henry Stewart

Patrick Allen

Insp. Cook

Derek Newark

Mercer

Dudley Sutton

Finch

Barry Jackson

Wheeler

Edwin Richfield

Richard Wattis

Sir Hilary Stanton

Ambrosine Phillpotts

Lady Truesdale

Allan Cuthbertson

Gus Ashley

Arthur Hewlett

Benjy

Spencer Banks

Charlie Todd

Candace Glendenning

Elizabeth (uncredited)

Robin Langford

Peter Pitt

Tom Bowman

John Savident

Steward

Andrew McCulloch

Billy

George Woodbridge

PC Andrew

Patrick Holt

Steward

George Innes

Insp. Timothy