Dropping on Amazon Prime in summer 2025, "Countdown" comes from prolific TV producer Derek Haas. A tense, high-adrenaline conspiracy thriller, "Countdown" begins with the high-profile murder of a ...

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.