The Crowded Snowglobe

X-Files crossed over with Millennium and spun off The Lone Gunmen. Scully and Mulder were mentioned (in the context of being real people rather than TV characters) on Picket Fences, visited the graveyard where the Salinger parents (from Party of Five) were buried, and visited Springfield to investigate an alien sighting on The Simpsons. So now we have The Simpsons and The Wire taking place in the same world, and that means that Mayor Quimby and Clay Davis are almost definitely buddies. And let’s not forget that an X-Files perp made an appearance as mugshot on Veronica Mars, not to mention that Veronica and Mulder both rent all their cars from Lariat Rentals.