Code of Vengeance to In the House

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.

A Klingon Bird of Prey was seen in a spaceship graveyard on Red Dwarf

In the Red Dwarf episode "Psirens", the crew of the Red Dwarf come across a space ship graveyard which includes a Weyland-Utani ship, connecting it with Angel.

Angel was a spin-off of Buffy the Vampire Slayer.

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

The mugshot of Malcolm T Wiggins from the X-Files episode "Titonus" appears on the wall of a police interrogation room in the Veronica Mars episode "Leave it to Beaver." Also the fictional car rental company Lariat where Mulder & Scully always rented their cars was featured prominently on the Veronica Mars episode "Rat Saw God."

In an episode of Veronica Mars, Veronica's fortune cookie had the numbers that won Hurley from Lost the lottery.

The airplane that crashed and strand the cast of Lost was Oceanic Airlines Flight 815 also featured on Diagnosis Murder.

Diagnosis Murder's Doctor Jesse Travis's father is a spy that someone is trying to kill. One of the possible suspects is the original Mission: Impossible's Cinnamon Carter.

George Jefferson gets help from Barney Collier from Mission Impossible

The Jeffersons family appeared on the final episode of Fresh Prince where they purchased the house from the Banks family.

In the House's Tiffany's boyfriend cheats on her with The Fresh Prince of Bel Air's Ashley. Also Carlton and In the House's Marion are friends