Hawaii Five-O to Still the Beaver
15 connections
Hawaii Five-O
Magnum P.I.
Magnum impersonates McGarrett of Five-O on the police radio
Murder, She Wrote
Murder, She Wrote had a two episode crossover with Magnum P.I.
Law & Order: Special Victims Unit
Jessica Fletcher taught criminology at Hudson University, where various Law & Order characters attended
Homicide: Life On The Street
John Munch was a detective Homicide and then SVU
The X-Files
Homicide's John Munch questioned The X-Files' The Lone Gunmen.
Veronica Mars
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."
Lost
In an episode of Veronica Mars, Veronica's fortune cookie had the numbers that won Hurley from Lost the lottery.
Diagnosis: Murder
The airplane that crashed and strand the cast of Lost was Oceanic Airlines Flight 815 also featured on Diagnosis Murder.
Mannix
Mannix returned to TV on an episode of Diagnosis Murder to solve an old unsolved case with the help of Dr Mark Sloan.
Here's Lucy
Here's Lucy's Lucy Carter and Mannix's Mannix are held hostage in an episode of Here's Lucy.
The Lucy Show
Here's Lucy's Mary Jane Lewis was originally a character on The Lucy Show (also called The Lucille Ball Show).
Hi Honey, I'm Home!
Mr. Mooney from The Lucy Show was on Hi Honey, I'm Home!
Leave it to Beaver
Leave it to Beaver's June Cleaver crossed over onto Hi Honey, I'm Home!
The New Leave it to Beaver
Leave it to Beaver was continued as The New Leave it to Beaver
Still the Beaver
Still the Beaver was retitled The New Leave it to Beaver