When Starz canceled Counterpart last year, it was one of television's greatest crimes, and it was made much, much worse by the fact the show, a Cold War allegory starring J.K. Simmons in fascinating dual roles, was quickly yanked from the Starz viewing platform. Now, the small screen is getting a do-over, as both seasons of the sci-fi spy thriller, which was our pick for "the saddest cancellation" of the season, are streaming on Amazon Prime.