Countdown (season 1)

Countdown is a high-stakes American crime drama series premiering on Amazon Prime Video on June 25, 2025. Created by Derek Haas - known for his work on the One Chicago and FBI franchises - the show stars Jensen Ackles as LAPD detective Mark Meachum. The story begins when a Department of Homeland Security officer is murdered in broad daylight. Meachum is recruited to a covert task force, joining undercover agents from multiple law enforcement branches to investigate the killing. As the investigation unfolds, the team discovers that the murder is just the tip of a much darker and more dangerous conspiracy, launching a tense race against time to prevent a catastrophe that could endanger millions of lives. The series blends action, suspense, and procedural drama, with each episode escalating the urgency and complexity of the case.