Eureka to Providence
6 connections
Eureka
Warehouse 13
Fargo from Eureka visits Warehouse 13 in a crossover episode
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.
Oz
Homicide's detectives watched Oz's Miss Sally on TV.
St. Elsewhere
St Elsewhere's hospital management company Weigert (was Ecumena) took over Oz's hospital.
Providence
On the series finale of Providence, St. Elsewhere's St. Eligius was suggested to Dr. Sydney Hansen as a future place of employment.