Ron Howard
— Ned De Vries
Art Carney
— Walter Peary
Tarah Nutter
— Kate De Vries
David Knell
— Brandon
Barry Corbin
— Dr. Agajanian
Richard Dysart
— Dr. Morton Freeman
Michael Bond
— Dr. Bill DeJong
Jim Haynie
— Doc Vandecamp
Robert Hirschfeld
— Harold
G.W. Bailey
— Jim Laszlo
Robert Behling
— Art
Ken Hixon
— Williams
Dwight Schultz
— Schlatter
Joe Miksak
— Al
Charlotte Stewart
— Mrs. Laszlo
Will Marchetti
— Farmer #3
Ross McKerras
— Man #1
Terry David Mulligan
— Man #2
Frank Papia
— Plant Manager
John Argue
— Chairman
Al Cingolani
— Harley
Linda Stuart
— Secretary
Matthew Locricchio
— Worker
Christopher Kriesa
— Marshall
J.E. Freeman
— Farmer #2