Harry Palmer

Michael Caine

Dalby

Nigel Green

Colonel H.L. Ross

Guy Doleman

Jean

Sue Lloyd

Carswell

Gordon Jackson

Radcliffe

Aubrey Richards

Bluejay

Frank Gatliff

Barney

Thomas Baptiste

Housemartin

Oliver MacGreevy

Alice

Freda Bamford

Gray

Barry Raymond

Charlady

Pauline Winter

Edwards

Anthony Blackshaw

Chilcott-Oakes

David Glover

Inspector Pat Keightley

Stanley Meadows

Sir Robert

Peter Ashmore

Raid Inspector

Michael Murray

Raid Inspector

Mike Murray

Raid Sergeant

Anthony Baird

O.N.I Man

Tony Caunter

Taylor

Charles Rea

Records Officer

Ric Hutton

Murray

Douglas Blackwell

Operator

Richard Burrell

Police Station Sergeant

Glynn Edwards

Prison Doctor

Zsolt Vadaszffy

Prison Guard

Joseph Behrmann

Prison Guard

Josef Behrmann

Prison Guard

Max Faulkner

Prison Guard

Paul S. Chapman

Security Clerk (uncredited)

Richard Beale

Otto Heller

Security Guard (uncredited)

Victor Charrington

Sidney J. Furie

Harry Saltzman

First Agent (uncredited)

Howell Evans

Maurice Askew

Audience Member at Symposium (uncredited)

Victor Harrington

Scientist (uncredited)

George Holdcroft

Tea Girl (uncredited)

Mollie Maureen

Ben Rayner

Scientist (uncredited)

Richard Neller

Nicholas Stevenson

Scientist (uncredited)

Dido Plumb

Norman Wanstall

Technician (uncredited)

David Saire

Security Guard (uncredited)

Jack Sharp

Scientist (uncredited)

George Spence

Dalby's Staff (uncredited)

Maggie Wright