"After inadvertently ingesting some sugar laced with LSD, a man wakes up with amnesia and in the middle of a murder plot."
Michael J. Pollard
as Dill
Harry Guardino
as Arthur Belding
Bradford Dillman
as Jonathan Fields
Hope Lange
as Helen Atterbury
Pat Hingle
as Lew Haley
Susan Saint James
as Ida
Diana Hyland
as Sarah
Victor Jory
as Edward Arkroyd
Paul Stewart
as Dr. Simon Joshua
Roy Jenson
as Arnie
Lev Mailer
as
Susanne Benton
as Arlene
Jim Creech
Kent McCord
Joan Bradley
James Doohan
as Building Superintendent (uncredited)
Donald Mitchell
as Peter (uncredited)
Howard E. Johnson
Art Direction
Edward A. Biery
Editor
Grady Hunt
Costume Supervisor
Mort Zarcoff
Associate Producer
Waldon O. Watson
Sound
Bud Westmore
Makeup Artist
Ranald MacDougall
Producer
John L. Russell
Director of Photography
Hal Overell
Set Decoration
John McCarthy Jr.
Larry Germain
Hairstylist
Quincy Jones
Music
James Goldstone
Director
Howard Fast
Novel
Peter Stone
Writer