|I had completely forgotten that there was a cartoon about the Brady Bunch until I ran across this while searching for mathematical fiction. But, it looks so familiar (the pet pandas, the cheesy animation, the musical numbers,...) I'm sure I watched it as a kid.
In this episode, Jan visits the math department of a nearby university to get help with her school project on Euclid. It turns out that the administrative assistant in the math department is none other than Diana Prince (a.k.a. Wonder Woman). By mistake, the Brady's magical pet bird (cf. The Parrot's Theorem) sends the kids and Wonder Woman back to ancient Greece where they meet Euclid and participate in the original Olympics.
The theme of the episode is "brains versus brawn", and math is clearly being used to represent the "brains" side of that dichotomy (while Wonder Woman is there to demonstrate that one person can have both). Unfortunately, Euclid is not portrayed as being particularly smart or helpful. He's just an annoying character who pops up occasionally to babble about arithmetic or the Pythagorean theorem.
I can't say I recommend this as a work of mathematical fiction, but it might fall into the "so bad, it's good" category where it is fun to watch just to see how awful it is.