Most shows set in the same "universe"?

It would have been 13 but the pilot for Most Wanted wasn’t picked up.

Does Legion count? Or has it been modified to not be about Charles Xavier’s son?

If you think of each cartoon, TV series or movie starring a Marvel character as existing inside a metaverse then every Marvel series since Marvel Super Heroes (1966) is part of the Marvel universe.

SPOILERS FOR LEGION

I’ll spoiler-box my answer and have actually asked the moderators to spoiler box your question.

Yes, it looks like Charles is his Father. He had a vision of his father fighting the big-bad and while we didn’t see Charles face, he saw a bald guy using powerful mind-power to fight the bad guy. It is clear Charles is his father, but the show has NOT laid this out yet.

I’ve edited this to have a spoiler box… please DO NOT just blurt out spoilers of this caliber, because when it’s this extreme, it’s hard to tell if the poster is doing it intentionally to make people mad or if it’s just an honest mistake.

It is about a character introduced in 1985. 32 years ago. This is “rosebud is a sled” level information.

What, you mean “Rosebud,” was a sled? Thanks for ruining *Citizen Kane * for me.

Curious, I looked to see if the entertainment media was treating this like some big spoiler to be kept secret, and nope. (Don’t click on or even mouse-over link if you watch comic book media but have never read an actual comic book for some reason.)

A rather obscure character, though, who most of the viewers of the show were probably not familiar with. I think it still qualifies as a spoiler.

Maybe so, but it was never treated as spoiler material in nerd-centric media (as in, the people likely to watch the show) in the period after the show was announced to be in production. For instance, this io9 article (dated February 2nd, the day before the series premiered) and this themarysue article (dated even earlier, from January 17th) treated it as basic information to be given as a background (the io9 article) and so basic that it was mentioned casually as a given (the themarysue article.) You’ll find many more other articles talking about the show before it aired that were similarly casual about such basic information.

If Simpsons guest appearances count then pretty much everything is linked.

I think the same rule would apply here as for the Game of Thrones threads: Just because the information is available in print doesn’t mean it’s not a spoiler for the TV audience.

About that information, though…

Isn’t Legion part of the Marvel Cinematic Universe? I thought they didn’t have the rights to use anything connected to X-Men or mutants, and Charles Xavier is certainly connected to X-Men and mutants.

Sherman Hemsley also played George Jefferson on ER, and The Fresh Prince of Bel-air, so that’s 2 more.
10.

Mr. Drummond form Diff’rnt Strokes was also on Fresh Prince, so now we have D. Strokes, and it’s spin off, The Facts of Life as well as Hello Larry,
so now at 13.

Legion is a co-production of FX and Marvel, so Fox is involved.

It simply never occurred to me that the information reached the “serious spoiler” level, but was simply part of the basic character bio. (I’ve never watched the show–don’t have F/X.) If someone had asked me to describe something about Legion, that is part of what I would have said, because frankly that is one of the key points of the character and always has been. Like if someone asked me who Wolverine was, I might have said that he is a guy with claws in his hands and unbreakable metal bones and the ability to rapidly heal. I absolutely don’t think it merited a PM from a moderator that included all-caps yelling and the assertion that he would "give me “the benefit of the doubt” that I was only a clueless idiot instead of a trolling jerk for posting that. (That wasn’t the exact phrasing, bur it sure was the connotation.)

As I said in an earlier post, the biggest crossover universe is probably Group 2 given on this website:

http://www.poobala.com/crossoverlistb.html

For the purposes of that website, two shows are in the same crossover universe if the same character played by the same actor appears on both shows.

For values of “character” that include a teddy bear and a spaceship.

Almost all of ABC’s daytime soap operas were set in the same ‘universe’ as characters crossed over among them all. That includes:

General Hospital
One Life to Live
All My Children
Ryan’s Hope
Loving
The City
Port Charles

“Dark Shadows”, as far as I know, never crossed over with any of the other series. But vampires did show up on “Port Charles”, so it’s not too much of a stretch to say that DS belongs in the same universe as General Hospial, et. al.

Phoebe from Friends and Ursula from Mad About You were twin sisters, and Kramer from Seinfeld sublets his apartment from Paul Bachman.

For what it’s worth, I think you’re more right than wrong about this. I could have sworn the TV series laid out that particular factoid in an oblique manner over multiple episodes.

I don’t know if other people do this, but when I start with a new Marvel- or DC-based program … I routinely Google the various characters to see “who they were” in the comics. Catch on to some Easter eggs that way. Anyway, I did that early on with Legion’s David … so maybe there are things about him that I only think I know from the TV show, but that I actually gleaned from an outside source.