Overview
An experiment on a simpleton turns him into a genius. When he discovers what has been done to him he struggles with whether or not what was done to him was right.
Crew
DirectorRalph Nelson
WriterStirling Silliphant
Cast
Cliff Robertson
Charlie Gordon
Claire Bloom
Alice Kinian
Lilia Skala
Dr. Anna Straus
Leon Janney
Dr. Richard Nemur
Ruth White
Mrs. Apple
Dick Van Patten
Bert
Edward McNally
Gimpy
Barney Martin
Hank
William Dwyer
Joey
Dan Morgan
Paddy
Marianna Case
Young Woman (uncredited)
Leon Collins
Tap Dancer (uncredited)
Harry Cooper
Conference Attendee (uncredited)
Frank Dolan
Eddie (uncredited)
Randee Lynne Jensen
Woman (uncredited)
Ralph Nelson
Convention Speaker (uncredited)
Donald Warnock
Conference Attendee (uncredited)
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Keywords
experimentmousegeniusintelligence test
Details
Budget
$1M
Revenue
$1M
TMDb Votes
117
Added May 14, 2026Updated Jun 4, 2026