Dolores Hart as Merritt Andrews

George Hamilton as Ryder Smith

Yvette Mimieux as Melanie Tolman

Jim Hutton as TV Thompson

Barbara Nichols as Lola Fandango

Paula Prentiss as Tuggle Carpenter

Chill Wills as Police Captain

Frank Gorshin as Basil

Rory Harrity as Franklin

Ted Berger as Stout Man on Beach

John Brennan as Dill

Connie Francis as Angie

Bess Flowers as Nightclub Patron (uncredited)

Percy Helton as Fairview Motel Manager (uncredited)

Vito Scotti as Maitre D' of The Tropical Isle (uncredited)

Leoda Richards as Fainting Lady (uncredited)

Jack Kruschen as Max (uncredited)

Jon Lormer as Elderly Man Outside Motel (uncredited)

Paul Frees as Narrator (uncredited)

Harold Miller as Nightclub Patron (uncredited)

Bert Stevens as Nightclub Patron (uncredited)

Arthur Tovey as Nightclub Patron (uncredited)