George Hamilton

Character: Prof. Jim Tanner

Aldo Ray

Character: Bruce

Suzanne Pleshette

Character: Prof. Margery Lansing

Richard Carlson

Character: Prof. Norman E. Van Zandt

Yvonne De Carlo

Character: Mrs. Sally Hallson

Earl Holliman

Character: Prof. Talbot Scott aka Scotty

Gary Merrill

Character: Mark Corlane

Ken Murray

Character: Grover

Barbara Nichols

Character: Flora

Arthur O'Connell

Character: Prof. Henry Hallson

Nehemiah Persoff

Character: Prof. Carl Melnicker

Michael Rennie

Character: Arthur Nordlund

Miiko Taka

Character: Mrs. Van Zandt

Celia Lovsky

Character: Mrs. Hallson

Vaughn Taylor

Character: Mr. Hallson

Beverly Powers

Character: Sylvia, party girl (as Miss Beverly Hills)

Lawrence Montaigne

Character: Briggs