Editor's Note: The following contains spoilers for Season 1, Episode 10 of CountdownFor most of Countdown’s first season, it’s been established that Jensen Ackles' Mark Meachum is going to die.

One of the must-watch summer crime dramas has been Countdown on Prime Video. However, like so many other shows, the first season is coming to an end. There’s still a lot to unpack, though. Caution: ...