Isaac and the Mermaids/Humpty, Dumpty/Aquaphobic

Gavin MacLeod

Merril Stubing

Bernie Kopell

Adam Bricker

Fred Grandy

Gopher Smith

Ted Lange

Isaac Washington

Lauren Tewes

Julie McCoy

Jill Whelan

Vicki Stubing

Jeff Cooper

Humphrey Clark

David Hasselhoff

Brian Kiley

Audra Lindley

Vanessa Norris

Louis Nye

Glenn Dobson

Anita Pointer

Jenny, a Singer in Isaac's Backing Group

June Pointer

Kate, a Singer in Isaac's Backing Group

Ruth Pointer

Georgia, a Singer in Isaac's Backing Group

Suzanne Kent

Mrs. Burns

Jason Hervey

Billy