WARNING: If you don't want to know what happened in this episode, don't read this photo recap!
Katarina Jones is dying of radiation poisoning. And as she walks her facility, she remembers a time when her husband Elliot had adoring students, research funding, and a cute assistant. Could his research hold the keys to what comes next? (Psst. Yes, probably.)
Back in 2046, Team Splinter discuss the note they found in the Ouroboros: "Blackleaf 1852". Cole isn't ready to tell anyone where he heard that story about "the serpent that traveled in one direction." (Psst. It's his mom.) The team realize that they're stuck in a time loop and the Primaries throughout time seem to be giving them the answers for breaking it.
And so, the gang head to the old west. Montana in 1852. And then they immediately start shooting in order to get new outfits. Soon enough, though, Team Splinter realizes that something is not quite right…
This town has people from a lot of different times. The saloon has people with iWatches, guns from the 1940s, and... someone we've seen before: Elliot Jones, Katarina's husband. Hannah's father. And it turns out, he works for the Pallid Man.
Team Splinter causes a distraction and create a tether for Elliot that sends him back to 2046. It's a Jones family reunion. Katarina is shocked to learn that Elliot has been hiding out in the past, building something…
Titan. Turns out, Elliot Jones is building Titan! The Army of the 12 Monkeys had been funding his research for years and it turns out, if you're building a massive time machine, what better place than in the past? The key is bringing in materials from the future and assembling them where nobody can find it!
Jennifer Goines is finally forced to confess that she's not able to hear the Primary voices any more. And as she does, they meet a Native American shaman, who's been waiting for them. He gives them a cryptic message: "Climb the steps. Ring the bell." They're not sure what it means, but Jennifer remembers it from the Primary voices.
Against everyone's better judgement, Jennifer drinks some of that red tea, and…boom. Olivia can see her in that weird "Primary outside of time" way. And now Olivia knows what Primaries throughout time had tried to hide from her: a weapon that can destroy Titan.
While the Army of the 12 Monkeys has been assembling Titan throughout time, the Primaries had been assmebling a counter-weapon. Once more, it involves the phrase "Climb the steps. Ring the Bell." But it's impossible to unravel. Worse, now Olivia knows that Cassie and Cole are in 1852.
Elliot and Katarina realize that Olivia doesnt just want to travel through time, she wants to create a Hartle-Hawking state: a paradox so big that it punches a hole through the middle of time. Titan is the way that Olivia gets her Red Rorest. And so, Katarina sends Elliot and Hannah back to stop that from happening.
During one of their usual fights around the table, everyone finally confesses what they've been holding back: Goines confesses she can't hear voices anymore, Cole confesses that his mother wrote the story of the serpent, and Jones confesses that she's dying.
…and then, Emma, who's been working undercover for the 12 Monkeys, goes back to Olivia, and says she knows how to complete Titan. More amazingly, she calls Olivia by her title. Not just "The Witness" - but Mother!