Mark Meachum (Jensen Ackles) in 'Countdown.' Prime Video Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Logo text Jensen Ackles is sharing his reaction to the news that Countdown was not renewed at Amazon's Prime Video for a second season. The crime thriller debuted its first season in June before wrapping up its 13 episodes in early September following a weekly rollout.