A 'Eureka' poster is revealed in the One-Season-Later scene
The character Douglas Fargo is from Eureka.
Einstein-Rosen bridge as a "wormhole"
Fargo's game has items like the Dagger of Josefina (referencing deputy Josefina Lupo) and having to save Leena from the Carter Curse (referencing Sheriff Jack Carter).
Series is discussed.