The only recurring character featured alongside series regulars Mr. Quizzer and Goldie Fisher is environmental expert Lorna Greene ("Resident Tree Hugger").
Toony's proposed reality show, titled "Tank Sweet Tank" (Live from the Studio Tank), features Bill, Toony, Mr. Quizzer, and Lorna Greene all living together in the studio, while the studio gradually fills with water and becomes a massive fish tank.
Billy Boy (1954) had been featured previously in Hello My BB (2021), and Duck Amuck (1953) had been featured previously in The New Sound Woman (2021).