Overview

• Officer Damon Drew, portrayed by Jonathan Togo, succumbs to fatal injuries after a high-risk mission in episode 4’s “Bite ’Em Down.”
• Jensen Ackles says Drew’s death marks an emotional detonation that forces Detective Mark Meachum’s task force to eliminate all mistakes.
• The series’ core tension deepens as Meachum races against his terminal brain tumor while fighting to prevent a nuclear attack on Los Angeles.
• Created by Derek Haas, Countdown combines surprise cameos with abrupt character exits to sustain urgency across its weekly Wednesday drops on Prime Video.
• The episode’s upheaval builds on earlier genre subversions, including Milo Ventimiglia’s surprise pilot cameo as a sympathetic murder victim.