Better Call Saul to DC's Legends of Tomorrow
6 connections
Better Call Saul
Breaking Bad
Breaking Bad spun off the prequel Better Call Saul
The X-Files
Breaking Bad characters rented cars from the Lariat Rent-A-Car which Mulder and Scully frequently rented from on X-Files.
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
Arrow
Hudson University is the fictional University where many Law & Order characters graduated as well as the location of F.I.R.E.S.T.O.R.M. On Arrow
DC's Legends of Tomorrow
Arrow spun off DC's Legens of Tomrrow