Private Secretary to The Hitchhiker's Guide to the Galaxy
12 connections
Private Secretary
The Lucy-Desi Comedy Hour
Lucy Ricardo was friends with Susan McNamera from Private Secretary
The Danny Thomas Show
The Danny Thomas Show's Williams family shares a home (briefly) with the Ricardo family on The Lucy-Desi Comedy Hour in 1958, the next year the Ricardo family returned the favor and visited the Williams' on The Danny Thomas Show.
The Dick Van Dyke Show
The Dick Van Dyke Shows' Buddy appeared in an episode of The Danny Thomas Show
Mad About You
Richard Diamond, Private Detective's Sam reprise her role on an episode of The Dick Van Dyke Show.
Friends
Friends was affected by the blackout created by Mad About You's Jamie on Blackout Thursday.
Caroline In The City
Caroline in the City's Caroline wished The Single Guy's Jonathan good luck
Frasier
Fraiser's Niles and Daphne read Caroline in the City's comic strip.
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"
The Hitchhiker's Guide to the Galaxy
The Tenth Doctor mentions knowing Arthur Dent of Hitchhiker's Guide to the Galaxy.