Klaus Kinski as Dr. Pieter Fales

Donna Wilkes as Alison Fales

Marianna Hill as Julie

Craig Wasson as Doug

Richard Herd as Donahue

Joe Regalbuto as Jake

Christopher Lloyd as Gilbert

Flo Lawrence as Pat

Kiva Lawrence as Rosemary

Claude Duvernoy as Françoise

Cindy Donlan as Sally

Jon Greene as Archie

David Assael as Barney

Richard Balin as Freddy

Fredric Cook as Willy

Kathy Garrick as Maxine

Gracia Lee as Bruce

Tobar Mayo as Fritz

Jonathon Millner as Fritz's Friend

Frances E. Nealy as Housekeepe

Kimberly Jensen as Girl on Motorbike

Jay May as Boy on Motorbike

Cindy Riegel as Secretary (uncredited)

Tony Swartz as Bartender (uncredited)