Millennium to Star Trek Enterprise
6 connections
Millennium
The X-Files
The X-Files' Jose Chung was also investigated by Millennium's Frank Black and later X-Files' Mulder and Scully meet Millennium's Frank Black.
Buffy the Vampire Slayer
The X-Files? Cigarette Smoking Man and Buffy the Vampire Slayer's Spike both smoked Morley cigarettes.
Angel
Angel was a spin-off of Buffy the Vampire Slayer
The John Larroquette Show
John Larroquette Show referenced Yoyodyne. Yoyodyne was also a client of Angel's Wolfram & Hart.
Star Trek the Next Generation
THe John Larroquette Show reference Yoyodyne which is the company that makes some of the starships mentione on Star Trek: TNG
Star Trek Enterprise
Both part of the Star Trek Universe