You've done it! You've braved the tunnels and laboratories of The Boroughs, met Mother (Nancy Daly) and her spidery "kids," and watched Sam Cooper (Alfred Molina) and his friends free them in a daring escape.

It's a happy ending for almost everyone involved. Sorry to the villainous Blaine (Seth Numrich) and Anneliese (Alice Kremelberg), but they had it coming. However, there are still some major revelations to unpack, and a few more questions the show has yet to answer. Let's break it down. What are the monsters in The Boroughs?

The origin of the spider-like nightmares who lurk in the tunnels beneath the Boroughs is tied to the founding of the retirement community itself.

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In 1949, Boroughs founder Marcus Shaw found an egg in a mine. It hatched a creature he called Mother. Drinking her blood holds your body in time. You won't age, get sick, or die, as long as you keep drinking the blood. Marcus has been drinking her blood for decades, but in order to keep his immortality a secret, he changed his name to Blaine and posed as Marcus' grandson.