Jane Fonda

Kimberly Wells

Michael Douglas

Richard Adams

Jack Lemmon

Jack Godell

Scott Brady

Herman De Young

James Hampton

Bill Gibson

Peter Donat

Don Jacovich

Wilford Brimley

Ted Spindler

Richard Herd

Evan McCormack

James Karen

Mac Churchill

Michael Alaimo

Greg Minor

Donald Hotton

Dr. Lowell

Frank Cavestani

News Reporter

Lewis Arquette

Hatcher

Rita Taggart

Rita Jacovich

Darrell Larson

Young Demonstrator

Michael Jeffers

Board Member (uncredited)

Paul LeClair

Board Member (uncredited)

Monty O'Grady

Party Guest (uncredited)

Hank Robinson

Reporter (uncredited)