Mel Smith as Bernard

Griff Rhys Jones as Graham Sweetley

Joanne Pearce as Sandra Brock

Jimmy Nail as Desmond Brock

Paul Bown as Julian Tope

James B. Sikking as Col. Raymond Laribee, CIA

Dinsdale Landen as Commander Grenville Matteson

André Maranne as Prof. Trousseau

George Innes as Stanley Benson

Tristram Jellinek as Simpson

Miriam Margolyes as Doctor Wallace

John Joyce as Chief Inspector Miller

Mark Lewis Jones as Godfrey

Leonard Fenton as Commissionaire

Joanna Dickens as Lady Farmer

R.J. Bell as Klutz

Peter Whitman as Friborg

Olivier Pierre as Jabowlski

Edward Wiley as Laribee's Assistant

Robert Austin as Newscaster

John Barcroft as McKenzie

Bill Stewart as Walters

David Joss Buckley as TV Presenter

Roger Hammond as Soundman

Des Webb as Eskimo Chief

Jo Ross as Woman in Dining Room

Jimmy Mulville as Motorway Policeman

Derek Deadman as Man in Car

Angela Crow as Woman in Car

Leslie Grantham as Motorway Policeman

Barbara Hicks as Stenographer

Tim Barker as Mathematician

Graham Fellows as Cipher

Bob Sessions as TV Presenter (US)

Shane Rimmer as Redneck (Melvin)

Diana Ricardo as Redneck Wife

Ian East as Scientist

Michael J. Jackson as Scientist

James Taylor as Minister

Christopher Northey as Whitehall Flunky

Susan Denaker as Nurse

Lesa Lockford as Nurse

Edward Arthur as TV Interviewer (UK)

Shelley Thompson as Nurse Purse

Richenda Carey as Countess Gretel

John Clamp as Bobby

David Haig as Palatial House Flunkey

Robert Henderson as Diner Customer

Karen Lancaster as Stanley's Assistant

Ronnie Stevens as Hotel Manager

Pamela Mandell as Mary

Robin Driscoll as Space Pilot

David Whitaker as Deputy

Barrie Holland as Minister's Dinner Guest (uncredited)