Kerwin Mathews
— Dr. Barnaby Cross
Diana Van der Vlis
— Cassandra
Norman Fell
— Lieutenant P. J. Hartunain
Larry Blyden
— Waldo Kent
Richard Anderson
— Timothy Selfridge
Michael Constantine
— Oscar Jensen
Margaret Hamilton
— Ivy Rumson
Kevin McCarthy
— Cameron Witherspoon
Anne Jeffreys
— Florence Blackstone
Richard Ney
— Bunky Norris