Four Spanish ex-intelligence officers are assassinated simultaneously worldwide. The CNI discovers all participated in the covert "Operation Ciénaga" decades ago in Colombia. Zeta, the CNI's best operative, must hunt and protect the sole survivor, facing his deadliest global mission yet. Top Colombian agent Alfa will join Zeta, seemingly knowing more about "Ciénaga"'s secrets than him.

Zeta

Alfa

Salvador Ancares

Elena

Marlon

Diana

Landa

Vivi

Maka

Acting

Baltar

Ancares joven

Esteban Furiase
"Agent Zeta" is a mixed bag. On the upside decent action, an interesting back story, characters with depth and plausible motivations. On the downside, political bias (ETA were an understandable response to a complex political landscape in Spain not helped by at times oppressive governance), a story that's a little incoherent and can unsurprisingly be difficult to follow, plus inconsistent pacing. In summary, a moderately watchable action thriller from Spain but not without shortcomings.
March 20, 2026

Zeta

Alfa

Salvador Ancares

Elena

Marlon

Diana

Landa

Vivi

Maka

Acting

Baltar

Ancares joven

Esteban Furiase
"Agent Zeta" is a mixed bag. On the upside decent action, an interesting back story, characters with depth and plausible motivations. On the downside, political bias (ETA were an understandable response to a complex political landscape in Spain not helped by at times oppressive governance), a story that's a little incoherent and can unsurprisingly be difficult to follow, plus inconsistent pacing. In summary, a moderately watchable action thriller from Spain but not without shortcomings.

