Code of Vengeance to Two Guys, a Girl and Pizza Place

The character of David Dalton first appeared on Knight Rider, then spun-off onto Code of Vengeance.

Team Knight Rider was a spin-off of Knight Rider.

1. Dr. Jackson Roykirk invented both the earthquake machine that had to be defeated by Team Knight Rider and the Nomad robot that had to be defeated by the Star Trek crew.

Star Trek TNG is part of the Star Trek Universe

THe John Larroquette Show reference Yoyodyne which is the company that makes some of the starships mentione on Star Trek: TNG

John Larroquette Show's John Hemingway called into Fraiser's show

Cheers spun-off Frasier

St Elsewhere's Westphall, Craig and Auschlander visited Cheers' bar

The Bob Newhart Show's Elliot Carlin visited the psych ward at St Elsewhere's St Eligius Hospital.

The Bob Newhart Show's Bob Hartley woke up after dreaming the entire series Newhart during Newhart's finale.

Newhart's Larry, Darryl and Darryl squatted in Coach's Hayden and Christine's home

On a network crossover night, The Drew Carey Show, Grace Under Fire's Grace Kelly, Coach's Luther and Ellen's Paige and Spence all show up. Finally on Ellen, Paige and Spence run into Grace Kelly and Drew Carey

Two Guys, A Girl, and a Pizza Place crossed over with The Drew Carey Show.