William Girdler Director Christopher George Steve Buckner Actor Lynda Day George Terry Marsh Actor Leslie Nielsen Paul Jenson Actor Richard Jaeckel Prof. Taylor MacGregor Actor Michael Ansara Daniel Santee Actor Ruth Roman Mrs. Shirley Goodwyn Actor John Cedar Frank Young Actor Paul Mantee Roy Moore Actor Walter Barnes Ranger Tucker Actor Susan Backlinie Mandy Young Actor Andrew Stevens Bob Denning Actor Kathleen Bracken Beth Hughes Actor Bobby Porter John Goodwyn Actor Michelle Stacy Little Girl Actor Garrison True TV Announcer Actor Michael Rougas Actor Gil Lamb Old Man in Bar Actor Michael Andreas Sheriff Actor Jan Andrew Scott Helicopter Pilot Actor Gertrude Lee Tucker's Wife Actor Walt Gorney Sam Actor William W. Norton Screenwriter Eleanor E. Norton Screenwriter Edward L. Montoro Screenwriter, Producer Robert Sorrentino Cinematographer Bub Asman Film Editing James Mitchell Film Editing Lalo Schifrin Original Music Marvin Paige Casting