Warning: This post contains major spoilers from tonight’s episode of “Homeland,” “The Litvinov Ruse”

Allison Carr's decade-long work as a Russian spy came to a screeching halt in tonight's episode of "Homeland," with Carrie Mathison and Saul Berenson exposing the Berlin CIA station chief's treachery via a carefully orchestrated stunt involving the help of German intelligence (the BND).

After...