‘For All Mankind’ season 4 episode 6 review: Culmination of a storyline decades in the making

Multi-season arcs are now the standard in prestige T.V., but most shows’ stories don’t unfold over multiple decades. Four seasons in, “For All Mankind”‘s alternative history of the space race now stretches from the late-1960s into the early 21st century, and seeds that were planted 30 (fictional) years ago are now coming to spectacular — and extremely satisfying — fruition.

The relationship between NASA boss turned defector Margo Madison (Wrenn Schmidt) and her protégée Aleida Rosales (Coral Peña) has been integral to the show since its early days. It went through a significant power shift in season 3 when Aleida suspected her boss might be caught up in some dodgy dealings with the Soviets. “Leningrad” picks up those threads and it’s utterly captivating to watch.