https://www.youtube.com/watch?v=5Ju6gfvFdGs

Does anyone know the episode this is from?

Goose for the Gander/The Stuntman (Season 3: Episode 2)

Nice. Thanks for sharing this.

Thanks. Does anyone know of any other Pie fights on Movies or Tv? I've seen so many that I love finding new pie fights I've never seen before.

I'm the same way. I'd never seen this one you posted.

Go to the 16:00 mark here and see three of the Mad Hatter's henchmen get pied during the fight (while the Mad Hatter just tosses some salad, ha!)
https://www.youtube.com/watch?v=9P2zcWju-rA

There were a few other pies tossed on "Batman" but this was the only Batfight that included pies.