Hennessy

Rod Steiger

— Niall Hennessy

Lee Remick

— Kate Brooke

Richard Johnson

— Insp. Hollis

Trevor Howard

— Comdr. Rice

Peter Egan

— Williams

Eric Porter

— Tobin

Ian Hogg

— Gerry

Stanley Lebor

— Hawk

John Hallam

— Boyle

Patrick Stewart

— Tilney

David Collings

— Covey

John Shrapnel

— Tipaldi

Hugh Moxey

— Stephen Burgess, MP

Margery Mason

— Housekeeper

Paul Brennan

— Maguire

Patsy Kensit

— Angie Hennessy

Oliver Maguire

— Mick

Elizabeth Romilly

— Shop Assistant

Charles Kay

— Westminster Guide

Diana Fairfax

— Margaret Hennessy

Diana Fairfax

— Maureen Hennessy

Peter Copley

— Home Secretary

Alan Barry

— Sgt Duggan

Graham Ashley

— Police Commissioner

Isolde Cazelet

— Mrs Hanagan

Paul Gregory

— Lieutenant

Christopher Blake

— Young Soldier

Paul Blake

— Rally Leader