Besides series regulars Bill, Toony, Goldie Fisher, and Mr. Quizzer, this episode also features a brief appearance from Mountgomery ("Trophy Fish"), voiced by an uncredited
Leila Gorstein. As the gang celebrates the show's (approximate) first-year anniversary, Mountgomery chimes in to point out how infrequently he gets to speak on the show (always hanging on the wall, but only making a snarky comment every 17 weeks, as is tradition).