David Naughton as David Kessler

Jenny Agutter as Nurse Alex Price

Griffin Dunne as Jack Goodman

John Woodvine as Dr. J. S. Hirsch

Don McKillop as Inspector Villiers

Brian Glover as Chess Player

David Schofield as Dart Player

Lila Kaye as Barmaid

Rik Mayall as Second Chess Player

Sean Baker as 2nd Dart Player

Frank Oz as Mr. Collins

Paul Kember as Sergeant McManus

Joe Belcher as Truck Driver

Paddy Ryan as First Werewolf

Anne-Marie Davies as Nurse Susan Gallagher

Colin Fernandes as Benjamin

Albert Moses as Hospital Porter

Michele Brisigotti as Rachel Kessler

Mark Fisher as Max Kessler

Gordon Sterne as Mr. Kessler

Paula Jacobs as Mrs. Kessler

Claudine Bowyer as Creepy Little Girl

Johanna Crayden as Creepy Little Girl

Nina Carter as Naughty Nina

Geoffrey Burridge as Harry Berman

Brenda Cavendish as Judith Browns

Christopher Scoular as Sean

Mary Tempest as Sean's Wife

Cynthia Powell as Sister Hobbs

Sydney Bromley as Alf

Frank Singuineau as Ted

Will Leighton as Joseph

Michael Carter as Gerald Bringsley

Elizabeth Bradley as Woman in Zoo

Rufus Deakin as Little Boy with Balloons

Lesley Ward as Little Boy's Mother

George Hilsdon as News-vendor

Gerry Lewis as Man in Bus Queue

Dennis Fraser as 2nd Man in Bus Queue

Alan Ford as Taxi Driver

Peter Ellis as Bobby in Trafalgar Square

Denise Stephens as Girl in Trafalgar Square

Christine Hargreaves as Ticket Lady

Lucien Morgan as Lance Boyle ("See You Next Wednesday" Cast)

Dave Cooper as Chris Bailey ("See You Next Wednesday" Cast)

Susan Spencer as Georgia Bailey ("See You Next Wednesday" Cast)

Bob Babenia as Usher

Ken Sicklen as Bobby at Cinema

John Salthouse as Bobby at Cinema

John Altman as Assorted Police

Keith Hodiak as Assorted Police

John Owens as Assorted Police

Roger Rowland as Assorted Police

Linzi Drew as Brenda Bristols

John Cannon as Villager (uncredited)

George Oliver as Man in Cinema (uncredited)

John Landis as Man Smashed into Window (uncredited)

Simon van Collem as Shop Owner (uncredited)