George C. Scott as Walter Upjohn Ballentine

Joanna Cassidy as Eleonora

Sorrell Booke as Al G. Karp

Clifton James as Bulldog Streiger

Bob Balaban as Victor Karp

Bibi Osterwald as Mums Gornik

G. Wood as Andrew Constable

Frank McRae as Herman Lincoln (aka Herman X)

Don Calfa as Stosh Gornik

Liam Dunn as House Painter

Jack Riley as Agent Jackson

Hank Stohl as Johnson

Harvey Evans as Irving

Liam Dunn as Painter

Jack Riley as Jackson

Pat Zurica as Man in Privy

Harvey J. Goldenberg as 1st Policeman

Jamie Reidy as 2nd Policeman

Bob Herron as Bank Guard (uncredited)

Robert F. Hoy as Bank Guard (uncredited)

Jack Perkins as Bank Guard (uncredited)