I had copywrited down at first, but it just sounded wrong. :smack:
Copyrighted even. :smack::smack:
I don’t watch any of the L&O shows these days but I think the only one that could qualify as a spin-off is SVU, because it features Kragen who was originally on L&O. But IIRC he was absent from L&O for several years prior to the debut of SVU so it’s still kind of a stretch.
OK, DS9 I would concede as a sort of semi-spin-off because of O’Brien but it’s tenuous. That characters from TNG appeared in the DS9 pilot and DS9 characters appeared in the Voyager pilot doesn’t, as you agree, make them spin-offs.
Let’s see, other spin-offs, other spin-offs…
“Family Ties” spun of Mallory’s boyfriend Nick into his own show that tanked quickly (I want to say it was called “Life with Nick” or “Nick’s World” or something similar, but I’m too lazy to look it up on IMDB).
“Designing Women” spun off Suzanne into “Women of the House,” although it has an L&O issue because of her absence from the original show for several years.
Now, how to classify a show like “Golden Palace”? It featured three of the four leads from “Golden Girls” (minus Bea Arthur) and had a new title, so is it a spin-off?
Mork & Mindy wasn’t really a spinoff. Network executives wanted to give the series some exposure before it started. To that end, Mork made his first appearance on the show that was #1 in the ratings for two years running.
Only if you’re referring to the 1970 movie, not the 1972-'83 tv show. 
That is an amazing site (though poorly designed).
Who had the time and resources to compile all that relatively meaningless crap? And as far as I could tell, its very accuracte. Simply amazing!
Probably true, but where do you find the official definition of a “spin-off”?
You Forgot Gomer Pyle
See post #4.
The Practice spawned Boston Legal.
Of note is that a Boston Legal character made a reference to the show Boston Public. (The high school show centered around the teachers.) Later, the Boston Public principle then appeared on Boston Legal as a defendant in a court case, thus shattering that crossover reality.
What about the quickly-forgotten AfterMASH?*
Oops, I forgot. Quickly.
A bit of a stretch but 60 Minutes begat 60 Minutes II.
IIRC, The Facts of Life was a spinoff of Different Strokes.
In the categories of forgettable:
Dukes of Hazzard spun off Enos
Alice spun off Vera
Flo, surely? I don’t remember one with Vera at all.
Oh! Just remembered one!
Didn’t BJ and the Bear spin off Sheriff Lobo?
Knots Landing, I’m pretty sure, was a spin-off of Dallas, with the uniting character being Gary Ewing.
They were also united, at least initially, by similarly funky, disco-esque theme songs. 
And I know The Practice had a crossover with Ally McBeal. But all four series are David E. Kelley shows, so they all exist in the same “shared universe.”
I should note that Steve Urkel from Family Matters made guest appearances on Full House and Step By Step (the Brady Bunch ripoff with Suzanne Somers and Patrick Duffy and their multiple kids), thus linking those three shows and also Perfect Strangers, which Family Matters originally spun off from.
Didn’t The Practice morph into Boston Legal rather than spin off from it?