I've never heard of alternate episode titles. Maybe you're right that it could be laborious and tedious to enter episode titles, but then maybe you could leave for someone with more patience (and time on their hands). With The Simpsons I once thought I'd try writing the name of the episode each car appeared in its comments page but I got bored very quickly, realised it would take at least an hour or so to finish and gave up.

Adding a list of episode titles at the bottom of the page isn't perfect, since you'd have to look at the episode, then scroll down (and if there's a lot of cars on the page that can be awkward) to check the list (and long lists can difficult to read in small font).

What I'm wondering is whether or not it would be too much trouble to add an extra field in the edit vehicle info section, then once that's done the option would be there for fellow administrators to fill the rest in, you wouldn't necessarily have to do any of it yourself and there needn't be any pressure for the admins to get it all done quickly.