The device that might allow them to return to their normal timeline has been destroyed. They can't tell anyone what happened. The android that replaced Sheriff Carter at the beginning of last season is back, but now he is the deputy. Deputy Lupo is head of security at Global Dynamics. Fargo is head of everything at GD. The guy from the 1940s is stuck in 2010 and is fascinated by our futuristic technologies, and always wants to smoke a cigarette.
My favorite quote from this week's episode was "I've been a part of this town for 60 years, I can't even begin to understand what you people do here, but Electricity doesn't change."
next week's episode apparently involves the town people becoming zombies whoop-de-fucking-doo.