* Kerwin Mathews as Russ Lambert
* Valerie French as Lisa Nordstrom
* Lee J. Cobb as Walter Mitchell
* Richard Boone as Vince Doyle
* Gia Scala as Theresa 'Teri' Renzetti
* Robert Loggia as Angelo Lagusa
* Joanne Woodward as Rosemary ('Sis') Nordstrom
* James Gregory as Marty Brennan
* Richard Jaeckel as Artie Renzetti
* Gerald S. O'Loughlin as Steve Breitner
* Eli Wallach as Tulio Renata
* Murray Alper as Al Gruber
* Joseph Pevney as Tony