Green Acres to Teen Angel

Petticoat Junction was a spin-off of The Beverly Hillbillies. Petticoat Junction spun off Green Acres. All three shows crossed over numerous times.

The Beverly Hillibillies? Granny appeared on an episode of Mister Ed (see below for more on The Beverly

Hi Honey, I'm Home!'s Lloyd was friends with Mister Ed

Sally Rogers from The Dick Van Dyke Show was on Hi Honey, I'm Home!

Richard Diamond, Private Detective's Sam reprise her role on an episode of The Dick Van Dyke Show.

Friends was affected by the blackout created by Mad About You's Jamie on Blackout Thursday.

Caroline in the City's Caroline wished The Single Guy's Jonathan good luck

Fraiser's Niles and Daphne read Caroline in the City's comic strip.

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

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

The Hughleys crossed over with The Parkers.

The Parkers was a spinoff of Moesha

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

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

Salem the cat from Sabrina visited was on Teen Angel during a network crossover night