In For All Mankind, there are perhaps fewer secrets and mystery boxes than other prestige TV shows. Refreshingly, the vast majority of tension in the series is derived from simply seeing what happens next, rather than some previously concealed detail hidden from the audience. That said, since Season 2, the series has sported a complex and emotional espionage plot, much of which revolves around the character of Margo Madison, a longtime NASA official, who, after faking her own demise at the end of Season 3, is working for the USSR space program Roscosmos in Season 4.
