Melrose Place (2009) to The Dick Van Dyke Show

Melrose Place (2009) was a continuation of Melrose Place which was a spin off of Beverly Hills 90210 that was continued as 90210

90210 was a spun off of Beverly Hills 90210

Brenda Walsh picks up a Morley smoking habit while in Paris on Beverly Hills 90210

The X-Files? Cigarette Smoking Man and Buffy the Vampire Slayer's Spike both smoked Morley cigarettes.

Angel was a spin-off of Buffy the Vampire Slayer

John Larroquette Show referenced Yoyodyne. Yoyodyne was also a client of Angel's Wolfram & Hart.

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

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

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

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

Mad About You's Paul did a documentary narrated by The Dick Van Dyke Show's Alan Brady.