William Katt

Elgin Smith

Susan Dey

Caroline Hedges

John Heard

David Bonner

Beverly D'Angelo

Shelley

Robert Loggia

John March

Tom Lacy

Professor Oxtan

Swoosie Kurtz

Marsha

Judy Kerr

Secretary

Pat O'Hara

Zookeeper

June Barrett

Felicia

Jenny Hill

Girl in Bar

Billy Beck

Cafeteria Proprietor (uncredited)

Bob Harks

Cafeteria Patron (uncredited)

Virginia Leith

Ann March (uncredited)

John O'Leary

Waiter (uncredited)