Countdown (TV) Cast
The cast of Countdown. Updated on September 30, 2025.
7 actors
Jensen Ackles
as Mark Meachum (13 episodes)

Jensen Ackles plays LAPD detective Mark Meachum, who joins a covert task force to investigate a murder tied to a broader conspiracy.

Jessica Camacho
as Amber Oliveras (13 episodes)

Jessica Camacho portrays Amber Oliveras, a key member of the undercover team working alongside Mark Meachum.

Eric Dane
as Nathan Blythe (13 episodes)

Eric Dane takes on the role of Nathan Blythe, an experienced agent who collaborates on the task force.

Violett Beane
as Evan Shepherd (13 episodes)

Violett Beane is Evan Shepherd, contributing her skills to the investigation and helping unravel the mystery.

Uli Latukefu
as Lucas Finau (13 episodes)

Uli Latukefu plays Lucas Finau, a determined and resourceful officer involved in the covert operation.

Elliot Knight
as Keyonte Bell (13 episodes)

Elliot Knight is Keyonte Bell, a dedicated member of the team working to uncover the truth.

Merrick McCartha
as District Attorney Grayson Valwell (6 episodes)

Merrick McCartha appears as District Attorney Grayson Valwell, overseeing legal matters related to the task force's findings.

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