It's too bad the 2D world didn't reference Flatland
. One of the things I like about Futurama
is the literacy, and scientific literacy, of the humor. But they didn't really spend much time there anyway. It was a mild episode, but not bad, with a lot of good gags, from the tesseract in the engine to "Nobody calls me professor!"
I do agree, though, that the second episode was funnier, if only for the ending-- they arrive to save Fry and Leela just in time for them to leave anyway. The zoo plot was a nice call out to Twilight Zone
. And I noticed that Leela was wearing those same "hooter hammocks" in the old picture with Sean.