Alphas to Castle
5 connections
Alphas
Warehouse 13
Dr Vanessa Calder from Warehouse 13 traveled to investigate deaths on Alphas
The X-Files
On Warehouse 13 Mrs. Frederic and Steve Jinks enter The Library, a secret room in the Vatican. There is a pack of Morley cigarettes on the table
Homicide: Life On The Street
Homicide's John Munch questioned The X-Files' The Lone Gunmen.
Law & Order
Law and Order and Homicide crossed over on four episodes
Castle
Hudson University from L&O also appears as the home of various victims and crimes in Castle,