In another thread (L&O vs CSI), I had mentioned that I really enjoyed the L&O and Homicide crossover.

Anyone else have any favorite Crossovers?

Another one of my favorites was Boston Public and The Practice

One of the hottest rumored crossovers back in the day was to have the X-files have a crossover two-story arc with picket fences. Man that would have been sweet.

Better than that was Ally McBeal and The Practice.

Buffy the Vampire Slayer and Angel were always welcome cross-overs, and they had several! (Willow at the end of Buffy season 5/Angel season 2? WHOA! )

The rumored Tobias Funke crossover into Scrubs would SO rock!

Yes I remember that one.

I have a bunch more favorites, but I wanted to have people the oppurtunity to bring them up

I was big fan of The Practice and didn't really like any of those crossovers, but I really liked the three L&O/Homicide crossovers.

Happy Days / Laverne & Shirley

Arnold & Willis being held hostage in the bank with Tootie outside

Law & Order / Homicide - all 3 (even with a different mix of characters) were very good.

Frasier Crane's crossover appearance on Wings was a funny one.

How about X-files and Simpsons - that was a hilarious episode. "Human Blimp Sees Flying Saucer."

I'd throw in Tim Hardaway, but he's on everyone's s-list right now.

OMG yes! That was amazing.

Third Watch/ER.

Haha, just kidding.

Lurch from the Addams Family making a cameo on Batman.

You know I totally forgot about NBC forcing Thursday night crossovers one season.

They had the two chicks from Mad About You in Central Perk addressing Phoebe like she was Ursula (who had obviously vanished from their show at that point). That was lame.

What about Happy Days/Mork and Mindy.

That happened didnt it?

Mork's first appearance was on Happy Days.

I think there was a crossover after M&M started.

St. Elsewhere/Cheers

Homicide/Law & Order - always great to see.

In the odd category but interesting was Detective John Munch appearing in an episode of the X-Files, he was questioning someone in the box.

waiting for the office to visit the montecito

I liked the Millennium/X-Files crossover episode. It didn't wrap up all the loose ends from Millennium's cancellation, but at least it provided some level of resolution to the show.

Didn't Dynasty and The Colby's have characters crossing over every now and then?

If memory serves correctly, Boss Hogg (Dukes of Hazzard) tried to buy Mel's Diner on Alice one time.

Yeah. Not a surprise since The Colbys was a spin-off. Same thing happened with Dallas and Knot's Landing.

Hiro from Heroes already did. That would have been funny if he met the cast of Vegas.

Faith(Eliza Dushku) crossing over to Angel in its first season was an incredible 2-episode stint. My favorite part of the entire series.

Dunder-Mifflin had a convention there this season - as mentioned on "Las Vegas"

And aside from the ones already mentioned, it wasn't really a crossover but it was cool seeing Hiro and Ando from "Heroes" heading into the Montecito as well.