 Paul DouglasPolice Ofcr. Charlie Dunnigan | Police Ofcr. Charlie Dunnigan |
 Richard BasehartRobert Cosick | Robert Cosick |
 Barbara Bel GeddesVirginia Foster | Virginia Foster |
 Debra PagetRuth | Ruth |
 Agnes MooreheadChristine Hill Cosick | Christine Hill Cosick |
 Robert KeithPaul E. Cosick | Paul E. Cosick |
 Howard Da SilvaDeputy Police Chief Moskar | Deputy Police Chief Moskar |
 Jeffrey HunterDanny Klempner | Danny Klempner |
 Martin GabelDr. Strauss | Dr. Strauss |
 Grace KellyMrs. Louise Ann Fuller | Mrs. Louise Ann Fuller |
 Frank FaylenWalter, room service waiter | Walter, room service waiter |
 Jeff CoreyPolice Sgt. Farley | Police Sgt. Farley |
 James MillicanPolice Sgt. Boyle | Police Sgt. Boyle |
 Donald RandolphDr. Benson | Dr. Benson |
 Richard Beymer(uncredited) | (uncredited) |
 Ossie DavisCab Driver (uncredited) | Cab Driver (uncredited) |
 Brad DexterReporter (uncredited) | Reporter (uncredited) |
 Leif EricksonBit Part (uncredited) | Bit Part (uncredited) |
 Sandra GouldHotel Switchboard Operator (uncredited) | Hotel Switchboard Operator (uncredited) |
 Russell HicksRegan, Hotel Manager (uncredited) | Regan, Hotel Manager (uncredited) |
 Brian KeithExtra (uncredited) | Extra (uncredited) |
 Harvey LembeckCab Driver (uncredited) | Cab Driver (uncredited) |
 John RandolphFireman (uncredited) | Fireman (uncredited) |
 Janice RuleBit Part (uncredited) | Bit Part (uncredited) |
 Joyce Van PattenBarbara (uncredited) | Barbara (uncredited) |
 Willard WatermanMr. Harris (uncredited) | Mr. Harris (uncredited) |
 John CassavetesReporter (uncredited) | Reporter (uncredited) |
 Rusty LaneCop (uncredited) | Cop (uncredited) |
 Alix TaltonMiss Kelly (uncredited) | Miss Kelly (uncredited) |
