Really John ?
I don’t remember that.
the last series… I think the guy they were running all those missions was supposed to be the guy that was in UNCLE… not Napoleon Solo.
Must have missed a whole series of A-team (the shame) 
Actually, Seinfeld was not included in the blackouts. Apparently, ABC decided that Seinfeld lived in a different area on a different power grid…It did include the 4th show, but like you, I can’t think what it was now…???
Here’s one I’ll be impressed if you remember: Diff’rent Strokes and Night Rider!
Also, Diff’rent strokes and Facts of Life, via Ms. Garret
I remember a special of The Incredible Hulk where there was a blatant attempt to start a new series off by tagging it in to an established one.
David Banner hooked up with this guy who could summon IIRC the Norse God Thor. I don’t think this worked as I never saw anything of Thor and his buddy after that. Maybe it was made and just didn’t make it to this side of the Atlantic ?
Didn’t Xena and Hercules once hook up?
Oh, hell. I’m nominating that as the most worthless sentence ever.
I thought one of the strangest cross-overs ever was the re-appearance of J. L. “Tenspeed” Turner, who’d been on the 1980 TV show Tenspeed and Brown Shoe, in 1988 on the show J. J. Starbuck. Apparently Stephen J. Cannell, who wrote both shows, decided he liked the character he’d created eight years before and brought him back (still played by Ben Vereen).
I saw that Incredible hulk!!!
It was too bad to get its own mini-series… really.
as for IH cross overs, did anyone see the episode with Daredevil? It might have been in one of the movies though…
I remember the Adam-12 guys showing up on Emergency a few times.
I don’t know, there was one episode where they were talking about sending someone to another hospital or something, and one of the characters said “You know, that OTHER Chicago Hospital,” and another character stopped him and said “We never mention that OTHER hospital.” So maybe they do live in the same universe.
I think ALL David E. Kelley shows are incestous. He hires the same actors over and over again. I saw a preview for his new show, Boston Public, and it has Fyvish (sp?) Finkle, who was Douglas Wambaugh on Picket Fences. You remember him, he had CHARACTER.
Don’t forget a couple of years ago ABC had a whole crossover evening, set in Las Vegas. All the sitcoms Ellen, Drew Carey and a couple of others participated. Every show had someone make a cameo appearance in another show.
Keith
If anyone dares remember the suckass TGIF of yesteryear, Steve Urkel from Family Matters appeared on Step by Step and Full House.
Also, Cory Matthews on Boy Meets World obliviously watched his own show once. That was screwed up.
–John
Wings and Cheers had a couple cross-over episodes, with various Cheers’ characters showing up at the airport in Nantucket.
Didn’t Chicago Hope and Early Edition have a cross-over once?
A bit off topic, as it is not a cross-over to my knowledge, but Thor from Marvel Comics will finally get his own show: http://www.scifi.com/scifiwire/art-main.html?2000-07/31/10.05.tv
Aren’t there shows in which the fictional characters appeared on RL game or talk shows? I remember Fran Fine going to watch the Rosie O’Donnell show, and I think I remember a couple of shows with people on Jeopardy.
StG
Don’t forget…
…the A-Team and Battlestar Galactica!!!
In one episode, Dirk Benedict, who starred in both shows, is on the back lot of a movie Hannibal is shooting. A “Cylon” walks by and Benedict turns, as if “there’s something familiar about that guy”, and then dismisses it.
Not a true crossover, but worth a mention. 
“The Prisoner” is thought to be a continuation of “Danger Man”, but it was never made explicitly clear. Of course with “The Prisoner” nothing was ever made explicitly clear.
Didn’t the girls from “Sister Sister” show up on “Full House” once? I think it was the same show with Urkel…
Of course!! Cliff Claven from Cheers went on Jeopardy and all of the categories were perfect for him…Mothers, The US Postal Service, Beer…
He had so much money and in the end he got Final Jeopardy wrong and lost. His questions was, “Who are 3 people who have never been in my kitchen?”
Classic.