"slow Horses" Cicada(2022) Link

The "Cicada" program is a clandestine espionage operation established by the Soviets during the Cold War. Like the periodical insects that remain underground for years before emerging in massive swarms, these agents were planted to live unremarkable lives until "activated" decades later.

: The plot reveals that Nikolai Katinsky, an ex-KGB agent thought to be harmless, was actually the spymaster behind the program. Narrative Analysis of "Cicada" (Season 2, Episode 4) "Slow Horses" Cicada(2022)

: For years, MI5 dismissed the existence of these agents as a myth. The "Cicada" program is a clandestine espionage operation