Season Regulars 6

1. 

   Gavin MacLeod

   Merril Stubing

2. 

   Bernie Kopell

   Adam Bricker

3. 

   Fred Grandy

   Gopher Smith

4. 

   Ted Lange

   Isaac Washington

5. 

   Lauren Tewes

   Julie McCoy

6. 

   Jill Whelan

   Vicki Stubing

Guest Stars 9

1. Jeff Cooper

   Humphrey Clark

2. 

   David Hasselhoff

   Brian Kiley

3. 

   Audra Lindley

   Vanessa Norris

4. 

   Louis Nye

   Glenn Dobson

5. 

   Anita Pointer

   Jenny, a Singer in Isaac's Backing Group

6. 

   June Pointer

   Kate, a Singer in Isaac's Backing Group

7. 

   Ruth Pointer

   Georgia, a Singer in Isaac's Backing Group

8. 

   Suzanne Kent

   Mrs. Burns

9. 

   Jason Hervey

   Billy

Crew 0

There are no crew records added to Isaac and the Mermaids/Humpty, Dumpty/Aquaphobic.