"A businessman is stalked by his murderous twin brother, who has just been released from a mental hospital."
Judd Hirsch
as Ben Ryder / Harry Ryder
Karen Carlson
as Donna Ryder
George Dzundza
as Lt. Conde
Barry Primus
as Det. Trelska
Anthony Charnota
as Genovese
Ron Karabatsos
as Anthony Scarnato
Lori Lethin
as Tina
Josef Sommer
as Mr. Rafferty
Estee Chandler
as Sharon Ryder
Matt Dill
as Jeff Ryder
John DeMita
as Greg Anderson
Martin Doyle
as David Sallinger
Dale Wilson
as Bud Harris
Stephen E. Miller
as Ollie Crandall
David Berner
as Dr. Marvin Cohen
Jay Brazeau
as Dr. Hollis
Blu Mankuma
as Wineman
Christianne Hirt
as Cathy Scarnato
Walter Marsh
as Harry Stanton
Don MacKay
as Ernest Deems
David Brass
as Vincent Malle
Ken Kirzinger
as Charlie
Lee Taylor
as Simon
Gregory Hayes
as Oop
Zoltán Sárközy
as Rockie
Shawn Clements
as Tommy
Alvin Sanders
as Patrolman Clark
Janet Wright
as Helen Neary
Freda Perry
as Car Rental Clerk
Ron Tarrant
as Delivery Man
Lillian Carlson
as Apartment Manager
Gillian Barber
as Ski Shop Clerk
William D. Blankenship
Novel
Ernest Tidyman
Teleplay
Andrew Gottlieb
Producer
Jonathan Tunick
Music
Bradford May
Director of Photography
David Rosenbloom
Editor
Ellen Meyer
Casting
Graeme Murray
Art Direction
Rondi Johnson
Set Decoration
Jean-Pierre Huchez
Hairstylist
Joann Wabisca
Makeup Artist
Frances Harrison Hays
Costume Supervisor
Christopher Ryan
Jeff Bleckner
Director