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When an officer with the Department of Homeland Security is murdered in broad daylight, LAPD detective Mark Meachum is recruited to a secret task force, alongside undercover agents from all branches of law enforcement, to investigate. But the hunt for the killer soon uncovers a plot far more sinister than anyone could have imagined, kicking off a race against time to save a city of millions.

Season 1 · Episode 12 ·
This Is His Signature
As another death ratchets up the pressure, the team makes a startling new discovery about their suspect.
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Episode 12 of season 1 of Countdown: “This Is His Signature”. Aired 2025-08-27. Watch it online free on ZapFlix.