Psyko-killer

George Hamilton

Prof. Jim Tanner

Aldo Ray

Bruce

Suzanne Pleshette

Prof. Margery Lansing

Richard Carlson

Prof. Norman E. Van Zandt

Yvonne De Carlo

Mrs. Sally Hallson

Earl Holliman

Prof. Talbot Scott aka Scotty

Gary Merrill

Mark Corlane

Ken Murray

Grover

Barbara Nichols

Flora

Arthur O'Connell

Prof. Henry Hallson

Nehemiah Persoff

Prof. Carl Melnicker

Michael Rennie

Arthur Nordlund

Miiko Taka

Mrs. Van Zandt

Celia Lovsky

Mrs. Hallson

Vaughn Taylor

Mr. Hallson

Beverly Powers

Sylvia, party girl (as Miss Beverly Hills)