Scientists are wired into an artificial world on this episode of Eureka. "The Real Thing" is the 2nd episode of the show's 5th and final season.
Added:

Eureka Season 5 Episode 2 Quotes

Jack: Senator Wen, you have to keep searching.
Senator Wen: Sheriff Carter, you have no idea how hard this decision is for me.
Jack: Then don't make it!

Grace: Doesn't seem real, everything that's happened, does it?
Allison: No