Only one?
I don't think I could possibly do that, not just because my definition of "greatest" will probably contrast greatly from just about anyone else's, but picking one out of dozens of hundreds would take me forever.
I can maybe pick five that I come back to often, but that would be it. The first five that come to mind would probably be:
American Dragon: Jake Long- "Homecoming"
This show was far from perfect, but this episode I think as still very well done. The dragon skulls arc was developing for a little while, and this episode was supposed to be the end of the saga, as well as to give Jake and Rose closure from their relationship. I think out of all the episodes from ADJL, this is where the best combination of tension, sweetness, humor, and character growth were all put together into one explosive punch.
The final fight is still one well-shot event, with the climax a very emotionally high sequence. On top of that, the ending with Jake discovering Rose's lack of memory is very bittersweet, which I think is the best way to end the episode. Jake isn't as naive now as he was at the start of the series, but that little bit of hope he has is what keeps him alive, and made me feel for the character.
Johnny Bravo- "Bravo Dooby Doo"
I've written about this episode a few times in the past, but I think the reason this one sticks to me the most is because it seem to celebrate both the classic and (then) current ages of the Hanna-Barbera studios. If you want to look at it one way, this can seem like a cynical episode, since they call out how corny the original Scooby-Doo episodes could be as well as how twisted modern cartoons like
Johnny Bravo tend to be, but to get to why something is so endearing, sometimes you do have to look at the negative aspects.
"Bravo Dooby Doo" was written like a traditional Scooby episode, just with a really messed up guest star like Johnny. The charming chemistry between the cast in classic episodes and witty dialogue in JB mesh together in a way that feels very natural. There are tons of clever jokes such as Fred and Daphne's subtle nudges towards each other and Johnny's responses to the group's shouting of "Jinkies!" that fans of Scooby-Doo will enjoy but at the same time doesn't harm the legacy of the great dane in anyway.
The Cartoon Cartoons were attempts to bring the animation industry forward in terms of writing and animation, but the people who worked on these didn't forget where they came from, since many of them started out at Hanna-Barbera. "Bravo Dooby Doo" is probably just the greatest nudge towards that.
Justice League Unlimited- "Epilogue"
I was considering adding in a few different BTAS episodes, but went with this one instead, since it has basically everything that I think would require a good episode of a DCAU show- a relatively deep conflict between its characters that gets resolved, but at the same time shows a bit of Batman/Bruce's humanity, explores the Batman mythos and reminds us of why we fell in love with Terry McGinnis to begin with. This was a really good way to wrap up the season after the Cadmus saga since it shows that the League and Amanda Waller do end on good terms, and that the JL would continue to save the day. It's also a fitting conclusion to
Batman Beyond, which the series didn't really get, but at the same time, it proves that Terry won't give up the mantle.
As much as I enjoyed "Alive" and "Destroyer", I would have been completely satisfied if they ended the DCAU with Terry recreating the flight from "On Leather Wings" like he did here.
King of the Hill- "A Fire-Fighting We Will Go"
One classic bit after another, from the guy's fire hydrant disaster to Rusty Shackleford's appearance to the ending
Rashomon tribute. While there are a few KOTH episodes that are emotionally superior, I'd be hard-pressed to find a funnier one.
Rocko's Modern Life- "Wacky Delly"
A bit expected, but this is great for those in the animation industry as well as just about anyone else. "Wacky Delly" is a clever satire that pokes at what sells for kids, but considering who worked on this show, I think it's all done with heart in mind. The ending is a little depressing, but honest and also done with a bit of heart and humor.
And who here wouldn't watch a show like
Wacky Delly?
Hey, one episode each per the five major animation studios for today. The funny thing is, KOTH aside, none of these shows would really constitute for my favorite show from each studio. I guess that just proves how highly I think of each episode.