John Rose as Philip Haller

Linda Southern as Sunny

Sandra Peabody as Joan Boyd (as Susan Sparling)

Will Patent as Peter Yates

Thomas Murphy as Howard Yates

Philip Baker Hall as Father Reis

Alexander Gellman as Gregory Haller

Edith Briden as Nancy Haller

Stephen Snow as Terry

George Linjeris as Jim

Spalding Gray as Radical at Party

Kelly Houser as Man at Physical

Larry Hunter as Detective