Robert Redford

John Dortmunder

George Segal

Andrew Kelp

Ron Leibman

Stanley Murch

Paul Sand

Alan Greenburg

Moses Gunn

Dr. Amusa

William Redfield

Lt. Hoover

Topo Swope

"Sis" Clara Kelp

Charlotte Rae

Ma Murch

Graham Jarvis

Frank, the Prison Warden

Christopher Guest

Policeman

Zero Mostel

Abe Greenberg

Harry Bellaver

Rollo the Bartender

Seth Allen

Happy Hippie

Robert Levine

Cop At Police Station

Ed Bernard

Policeman

Lee Wallace

Dr. Strauss

Robert Weil

Albert

Lynne Gordon

Miasmo

Grania O'Malley

Bird Lady

Fred Cook

Otto

Mark Dawson

Big Museum Guard

Gilbert Lewis

Museum Guard #1

George Bartenieff

Museum Guard #2

Charles White

Policeman

Albert Henderson

Prison Property Clerk (uncredited)

Burt Richards

Police Officer (uncredited)

Arnold Williams

Prisoner (uncredited)