1973 Sigmund and the Sea Monsters S01E01 The Monster Who Came to Dinner

Sigmund and the Sea Monsters TV Series 1973–1975 TV-G
Scott C. Kolden, Johnny Whitaker, and The Krofft Puppets in Sigmund and the Sea Monsters (1973)
Two boys try to maintain normal lives while secretly having adventures with families of sea monsters and genies.
Creators: Marty Krofft, Sid Krofft, Si Rose
Stars: Johnny Whitaker, Scott C. Kolden, Billy Barty
S1.E1 The Monster Who Came to Dinner Episode aired Sep 8, 1973 TV-G
Billy Barty, Scott C. Kolden, Johnny Whitaker, and The Krofft Puppets in Sigmund and the Sea Monsters (1973)
Johnny and Scott bring Sigmund home to live in their clubhouse, but the sea monster is nearly discovered by Zelda and the Sheriff when Sigmund's monstrous brothers come looking for him.
Writers: Marty Krofft, Sid Krofft, Si Rose
Stars: Johnny Whitaker, Mary Wickes, Scott C. Kolden