Re: episodes that are part of two different TV series
Cheers took place in Boston and had a character named Frasier who later got his own series, Frasier, featuring Daphne and Niles who appeared in Caroline in the City which featured Lea Thompson as Caroline who appeared in Friends, which featured a character named Phoebe who's twin sister was a waitress in the restaurant in Mad About You where Paul Buchman has subleted his apartment to Kramer on Seinfeld. Further the blackout caused by Jamie in MAY effected Mad Man of the People, Ross "dated" the main character in The Single Guy and Frasier and Lilith appeared on Wings! FURTHER characters from Cheers spun off St. Elsewhere!
And, once again, with Carl Reiner's appearance as Alan Brady on "Mad About You", the entire bunch of shows clearly exist in the same universe as "The Dick Van Dyke " show from the 1960's.
OHHhhhhh . . . the pain . . . the pain . . .
My favorite TV show is "Cool Hand Luke Skywalker--Texas Ranger". The best episode is the one where he fights Samantha's wacky Sith Lord Uncle, Darth Arthur . . ."