Check that your documents are in order and prepare to make an unusual border crossing. “Counterpart” is a spy thriller with a science fiction twist. Featuring a great lead performance from J.K. Simmons and an incredibly strong supporting cast, this is a show that features exciting spycraft mixed with some serious questions about identity, the sum of our experiences, and the road not taken. We discuss the first season, with a spoiler horn before we get to the most surprising plot twists that lead into the show’s forthcoming second season....