I think retirement for KGB spies is like retirement from the Mob. You don't. You get a bullet to the brain or sent to Siberia never to be heard form again. Gabriel's retirement scenario to William was all BS.

I saw what you did there, Comrade Smirnoff!

Possible stray observation?: Mike wincing when the vet patted him on the shoulder on his way out. Further solidifying Mikes' inevitable movement towards the "next level". Wasn't that the same shoulder that the vet repaired?

—"Hey, that rug really ties the Dome together"

One more reference to "2001:A space odyssey" when Lou and Jim are in the computer room and the camera pans back and forth between the two, Ginsberg is trying to read their lips or is reading their lips. Poor Ginsberg: “Just because you're paranoid doesn't mean they aren't after you”