In the penultimate episode of For All Mankind Season 4, “Brazil,” the United States and USSR decide the time is right to reveal that there’s an undercover CIA agent and KGB agent working right alongside Helios employees and NASA astronauts at the Happy Valley Mars base. Smack-dab in the middle of the episode, base commander Danielle Poole has to deal with the fact that two people she’s been working with have been spies.
