This weekend, the second-to-last episode of “Amphibia” airs on the Disney Channel.

The series, created by Matt Braly (a veteran of classic Disney series “Gravity Falls” and “Big City Greens”) was disarming in its simplicity, at least initially. When the show started out, it was about a young Thai-American girl named Ann Boonchuy (Brenda Song), who is mysteriously transported to Amphibia, a world populated with andromorphic frog creatures, and falls in with the Planter family – Hop Pop (Bill Farmer), young Sprig (Justin Felbinger) and even-younger tadpole Polly (Amanda Leighton).

But what starts out as a fish-out-of-water comedy soon became much, much more epic. Ancient feuds were revealed, more human characters entered the upside-down frog world and in the third season, the Planters were transported to our world, which led to more fish (frog?) out-of-water stuff but here. It’s been a wild ride. And now, after three seasons and 56 episodes and various shorts,...