K9 and Company to Trapper John, M.D.
9 connections
K9 and Company
Doctor Who (1963)
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.
Red Dwarf
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"
Angel
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.
The John Larroquette Show
John Larroquette Show referenced Yoyodyne. Yoyodyne was also a client of Angel's Wolfram & Hart.
Frasier
John Larroquette Show's John Hemingway called into Fraiser's show
Cheers
Cheers spun-off Frasier
St. Elsewhere
St Elsewhere's Westphall, Craig and Auschlander visited Cheers' bar
M*A*S*H
St Elsewhere's Mark Craig talked about M*A*S*H's BJ Hunnicut.
Trapper John, M.D.
MASH spun off Trapper John, M.D.