Nightmare City

Hugo Stiglitz

Dean Miller

Laura Trotter

Dr. Anna Miller

Maria Rosaria Omaggio

Sheila Holmes

Francisco Rabal

Major Warren Holmes

Sonia Viviani

Cindy

Eduardo Fajardo

Dr. Kramer

Stefania D'Amario

Jessica Murchison

Ugo Bologna

Mr. Desmond

Sara Franchetti

Liz the Maid

Manuel Zarzo

Colonel Donahue (as Manolo Zarzo)

Tom Felleghy

Lieutenant Reedman (as Tom Felleghi)

Pierangelo Civera

Bob

Achille Belletti

TV Station Technician

Mel Ferrer

General Murchison

Agustín Bescos

Man in Elevator (uncredited)