George Hamilton as Prof. Jim Tanner

Aldo Ray as Bruce

Suzanne Pleshette as Prof. Margery Lansing

Richard Carlson as Prof. Norman E. Van Zandt

Yvonne De Carlo as Mrs. Sally Hallson

Earl Holliman as Prof. Talbot Scott aka Scotty

Gary Merrill as Mark Corlane

Ken Murray as Grover

Barbara Nichols as Flora

Arthur O'Connell as Prof. Henry Hallson

Nehemiah Persoff as Prof. Carl Melnicker

Michael Rennie as Arthur Nordlund

Miiko Taka as Mrs. Van Zandt

Celia Lovsky as Mrs. Hallson

Vaughn Taylor as Mr. Hallson

Beverly Powers as Sylvia, party girl (as Miss Beverly Hills)

Lawrence Montaigne as Briggs