Frasier to K9 and Company
5 connections
Frasier
The John Larroquette Show
John Larroquette Show's John Hemingway called into Fraiser's show
Angel
John Larroquette Show referenced Yoyodyne. Yoyodyne was also a client of Angel's Wolfram & Hart.
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.
Doctor Who (1963)
The TARDIS from Doctor Who appears in the hangar bay of the Red Dwarf - it can be seen during the launch of Starbug in the episode "Thanks for the Memory"
K9 and Company
K9 and Company was a pilot for a spin-off aired as a one-off episode broadcast as a Christmas Special in 1981 - featuring The Doctor's old companions K9 - the robot dog - and Sarah Jane Smith.