Drill makes his final move in a deadly end-game.
Drill reveals which child that he possesses... or does he? Wes tries to save Minx, while Sean makes a deal with Goetz.
Claire and Wes convince President Winters to round up all the children in the hopes that they will negate Drill's primary weapon against them. However, Drill manages to infiltrate the quarantine facility.
The team attempt to destroy Drill once and for all using the knowledge that they've gained. However, if they fail, Drill's retribution will be swift and terrible.
Claire and the others attempt to keep Thomas Harcourt alive, in the hopes that he can provide information on Drill's ultimate goals. However, Drill sets a new plan in motion to kill his former "friend."moreless
Sean has no choice but to help the government find a way to stop Drill, but asks for a night alone with his family first. Meanwhile, Lean continues communicating with Drill through Minx, and Frommer orders Jessup to take Henry into custody.moreless
Caleb's presence causes Norman concern and leads to Dylan questioning his loyalty to Norma and Norman. Meanwhile, Norma is invited to join the White Pine social scene and Romero realises he is in the middle of a drug war.moreless
When Norma's brother, Caleb, appears, Dylan must help build bridges. Meanwhile, Norman gets to know a townie girl and Norma's battle to stop the bypass gets a new ally.
Jack asks for Elizabeth’s hand but he gets orders that change his plans.
Elizabeth has to put on Coal valley Founder’s Day, Jack helps the only coal mine survivor accept what happened to him help his family also come to terms with it.
Abigail wants reopen the café but the business deal she will have to make may keep the dream from coming true. Jack and Elizabeth have to figure out if they still love each other after Elizabeth found out Adam’s secret.
Elizabeth and Jack get to know each other after he finds oil that points to a widow to possibly burning the church. Elizabeth gets a lead from a student that could put her in danger as she learns the widow had planned to marry after her husband died.
Elizabeth tries to get a student to talk about the accident. As Jack looks in the cause of the fire, Elizabeth’s student is missing and has a lot to tell.
Coal Valley gets more bad news, new miners come to town and now the families that live in those homes have to move out. The women come up with a way to stay in Coal Valley. The plan could put the women in danger. Elizabeth Thatcher comes up with a different plan that will hopefully save their homes.moreless
Coal Valley finds something at the mining site that has the town upset and wondering who wrote the message on the plank. The townspeople learn loved ones that died in the accident have been found.moreless
After Senator Wen calls off the search, Kevin designs a tool to find the Astraeus ship that is still missing after four months. Unfortunately, the device's assembly stops after Andy and Carter are arrested while stealing a component for it. Elsewhere, Jo's walkabout is rocky, and at the Astraeus crew's location Dr. Marten posits a dangerous theory about their situation.moreless
When the ship with the Astraeus crew returns to earth, its occupants discover that four years have elapsed and time isn't the only thing that has changed.
The man with the Ogi Jun tattoo is identified. Jamie tries to recruit help from Gwen. Stan's past may finally be catching up with him.
Intending to meet with her mysterious new financial adviser, Magnus flies off to a remote African island - only to become embroiled in a dangerous hostage situation. Meanwhile, back at the fort, Will and Henry have their hands full tracking an escaped Steno.moreless