In the finale of The Diplomat season 3, Kate faces yet another geopolitical dilemma: what to do about the Russian submarine in parked in U.K. waters that may or may not have a nuclear weapon onboard.

For Kate Wyler, Keri Russell’s central character on The Diplomat, the personal is always entangled with the professional. She’s a career diplomat who is married to Hal Wyler (Rufus Sewell), another ...

We're used to big twists on "The Diplomat" — but we have to admit: We didn't see this one coming. Season 3 of the Netflix thriller wrapped up with a finale that sees Kate and Hal join Penn and ...