Exploring the multiverse

Oh, and I'd be remiss if I didn't post this:

The Tommy Westphall Project

The series finale of St. Elsewhere revealed that the entire universe of St. Eligius in Boston actually existed inside the mind of Tommy Westphall, a kid who'd been a regular on the show. (That actor later showed up on Dr. Quinn, Twentieth Century Woman Trapped in the Frontier But With Her Attitudes Intact.)

How does it work? A sample:

1. In the center: St Elsewhere's Dr Turner was investigated for murder by Homicide's Pembleton and Bayliss. And St Elsewhere's entire run was just a dream inside autistic Timmy Westphal's head. This means every show listed below is a figment. And Newhart (and the shows that crossed over with it) are a figment twice over. (See: Bottom right quadrant)

2. Top left: St Elsewhere's Westphall, Craig and Auschlander visited Cheers' bar
A. Cheers' Norm, Cliff, and Drs. Crane visited Wings' airport.
i. Cheers spun-off The Tortellis with Carla.
ii. And going back to Cheers it also spun-off Fraiser.
(1) John Larroquette Show's John Hemingway called into Fraiser's show.
(2) Fraiser's Niles and Daphne read Caroline in the City's comic strip.
(a) Caroline in the City's Caroline wished The Single Guy's Jonathan good luck.
(b) Caroline in the City's Annie was hit on by Friends' Chandler. (Also on an episode of Friends, Chandler and Joey tried to impress CITC’s Caroline with Ross’ baby, Ben)
(i) Friends' Ross visited The Single Guy's Janeane.
(ii) Hope and Gloria's title characters visited Friends' Central Perk.
(iii) Friends’Joey spun off onto his own show Joey.
(iv) Friends’ Phoebe and Mad About You's Ursula are sisters.
1. In the first crossover theme night listed, Madman of the People and Friends were both affected by the blackout created by Mad About You’s Jamie on Blackout Thursday.
2. Mad About You's Paul leased his old apartment to Seinfeld's Kramer.
3. Mad About You's Paul did a documentary narrated by The Dick Van Dyke Show's Alan Brady.
a. The Dick Van Dyke Shows’ Buddy appeared in an episode of The Danny Thomas Show

And so on and so on...

Beats Marvel/DC crossovers into a cocked hat, doesn't it?