Watching this again, I was reminded of one of the more obscure jokes that I liked:
young chimp: "Whatever happened to honor?"
Matthew: "She was replaced by Diana Rigg"
I wasn't completely sure what that referred to, but I expected it was a reference to the old TV show, The Avengers, and I remembered that the Emma Peel character (played by Diana Rigg) was brought in to replace the original companion for Steed. I looked that up, and the original companion was Cathy Gale, played by the actress Honor Blackman. I do remember the name "Cathy Gale", but not the actress who played her...
I also liked the ending where Miss Embaudio sings a fake theme song for The Planet of Apes, sung to the ending music for the original Star Trek series. Well done!