Peter Punk to Third Watch

Peter Punk crossedover with Zeke and Luther

Burger from I"m In The Band nearly runs someone over, yelling "Skateboard on the sidewalk, Zeke!", in reference to Zeke and Luther

I'm In The Band crossed over with Suite LIfe on Deck

Mr. Moseby from The Suite Life was on Jessie

Jessie and Austin & Ally crossed over

Austin and Ally appear on an episode of Girl Meets World. Bringing the Disney Channel Live Action Universe into the Westphall Universe

Continuation of Boy Meets Wolrd

Sabrina the Teenage Witch also crossed over with Boy Meets World on several other occasions.

Sabrina from Sabrina the Teenage Witch visited Cher from Clueless in the episode "Mr. Wright."

Hakeem and Niecy from Moesha went to the prom with Cher and Sean from Clueless.

The Parkers was a spinoff of Moesha

The Hughleys crossed over with The Parkers.

The Drew Carey Show's Mimi appeared in an episode of The Hughleys

The Drew Carey Show did a cross over with Coach.

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

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

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

St Elsewhere's Dr Turner was investigated for murder by Homicide's Pembleton and Bayliss.

Chicago Hope's Jeffrey Geiger accepted an organ of a victim on Homicide

A reporter on Chicago Hope talked to Dr. Austin about having been accepted into the space program and mentions an ER doctor from County was also accepted. In a separate episode of ER Dr. Greene was accepted in the space program.

ER's Dr. Lewis went to New York to look for here sister and was aided by the characters of Thrid Watch.