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Lioness Season 3’s Biggest Betrayal Explained: Who Turns on Joe McNamara?

Lioness Season 3’s Biggest Betrayal Explained: Who Turns on Joe McNamara?

Zoe Saldana as Joe in Lioness S3 (Credit: Paramount+)
By Updated on August 19, 2026

Joe McNamara has survived firefights, black sites, and Russian interrogation rooms. What she hasn’t survived yet is figuring out who sold her out.

Season 3 splits between a past timeline, where Joe and her team extract Putin’s asset Aleksi Yurimov from the Russia-Ukraine front line, and a present timeline, six months later, where Joe is already chained to a bed in an abandoned facility. Somewhere between those two points, someone gave her up. The show just hasn’t said who yet.

Is Oleksandra the Mole Who Betrayed Joe?

Elizaveta Neretin as  in Lioness Season 3
Elizaveta Neretin as Oleksandra Balakin in Lioness Season 3 (Credit: Paramount+)

The first real suspect is Oleksandra Balakin, the Ukrainian double agent Joe’s team pulled in for interrogation after two Russian agents attacked her home. Oleksandra spent years embedded inside Russia’s SVR, and she’s the one who gave up Yurimov’s location back in the premiere, which makes her an obvious target for suspicion.

But the case against her has holes. Oleksandra argues that if she’d sold Joe out, the Russians would have known about the Ukraine mission from the start and could have grabbed her long before now.

Kyle McManus still doesn’t buy it and accuses her outright, and Oleksandra fires back hard enough to attack him. Instead of confirming guilt, the confrontation opens up something bigger.

Related: Who Is Grady in Lioness Season 3? Ian Bohen’s Character Explained

The Rot Runs Deeper Than One Double Agent

A still from Lioness Season 3
A still from Lioness Season 3 (Credit: Paramount+)

Rather than clear her name outright, Oleksandra hands Joe’s team something worse: proof that Russian intelligence has been quietly compromising Americans for years. She lays out a network of blackmailed assets, including a school district superintendent, reporters, and low-level officials, all managed the same way the CIA runs its own Lioness operatives, just with a different endgame.

That’s the pivot the season needed. Joe stops chasing a single traitor and starts hunting a system. She uses Oleksandra as bait, letting word spread that the CIA has Yurimov in custody without naming names, betting that the real mole will panic and expose themselves trying to protect their position.

It’s a smart trap, but it also means the show is deliberately keeping its cards close. Every episode so far has added a new possibility, from Oleksandra’s real loyalties to whoever inside the CIA tipped off the Russians about Joe’s identity in the first place, without confirming any of them.

The stakes only get higher from here. Joe’s family has already been relocated once, two bodies are on her lawn, and the present-day timeline has already shown her strapped to a bed with no clear way out. Whoever the traitor turns out to be, the show has made it personal enough that the reveal is going to hurt.

Lioness Season 3 drops new episodes on Sundays on Paramount+, with episode 4 arriving August 23.

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