Drill makes his final move in a deadly end-game.
To stop more Omec from invading Earth, Nolan must lead a small team on a suicide mission to destroy Kindzi's cruiser.
Drill reveals which child that he possesses... or does he? Wes tries to save Minx, while Sean makes a deal with Goetz.
Nolan and the other learn about the pending Omec invasion and search for Kindzi. Meanwhile, Datak convinces Yewll to give him a fighting chance against his Omec captors, and Stahma tries to make amends with her son.moreless
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.
Berlin returns to Defiance and helps Irisa find Nolan, who was abducted from the VC convoy. Meanwhile, Kindzi drains T'evgin of his blood to keep him captive, and Datak asks Yewll for help defeating the Omec.moreless
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.
The VC send a representative to Defiance to negotiate a peace with T'evgin. However, complications from Nolan's recent operation complicate matters. Meanwhile, Datak returns from the dead only to discover that T'evgin is in love with Stahma.moreless
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
An unknown creature tears apart an Indogene, and Yewll appears to be the victim... until she turns up alive and well. Meanwhile, Nolan comes to terms with the death of the militia under his command, and Stahma tries to apologize to Amanda.moreless
Nolan and the militia receive help from an unexpected ally, but learn that he's not all that he appears. Meanwhile, Amanda gives Datak the chance to restore his honor and redeem himself when Yewll comes up with a way to defeat the VC army.moreless
When it becomes clear that Drill wasn't destroyed along with the rock, Claire and Sean seek out a man who underwent the same experience as Sean 30 years ago.
An arms dealer brings Defiance deliverance, but asks for a drink with Berlin as his only price. Meanwhile, Datak is sentenced to death and prepares for his execution, and asks a sacred favor of his son.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
Datak and Stahma go on the run when Alak exposes them to keep his son. Meanwhile, the Omec refuse to help Defiance, and Rahm receives a visit from home.
After bringing together Drill's "friends," Claire and the FBI learn more about Drill. Meanwhile, Wes brings the recovered object back from Mali and Sean warns that it's calling to him.
Yewll works desperately to save Nolan and Irisa, and is forced to turn to the Omec for help. Meanwhile, Alak escapes from Rahm, and Stahma takes steps to thwart her husband's plan to assassinate T'evgin.moreless
While Claire meets with Sean, Wes finds a clue that leads him back to Mali... unaware that it's a trap set by Drill. Meanwhile, Lena grows increasingly nervous watching Minx for any signs that Drill is talking to her again.moreless
After someone blows up the Arch, Nolan and Amanda travel to an E-Rep weapons cache to replace the weapons destroyed by the Shrill. However, they end up meeting an old friend. Meanwhile, Stahma receives new orders from Rahm: assassinate T'evgin.moreless
Claire and Wes learn where Sean is heading, and try to stop him from setting off a nuclear meltdown. Meanwhile, Minx meets Henry for the first time and gives him instructions for Drill's game.moreless
Sean takes Maria hostage, while Claire and Wes discover what Drill's next target is.
While Drill continues manipulating the children, Claire and Jessup discover that Sean was at the hospital... and is the man in Ms. Bellings' sketch. Meanwhile, the FBI trace the computer breach to Wes' home computer, and Maria receives an unexpected visitor.moreless
FBI Agent Claire Bennigan investigates a six-year-girl who attempted to murder her mother, and soon comes to believe that a mysterious person named Drill is manipulating children into killing their parents. Meanwhile, Defense Department agent Wes Lawrence is summoned to the Sahara Desert to investigate a bizarre fulgurite structure holding a missing F-22 that disappeared 4,000 miles away.moreless
In the finale, Peter races to stop the Order of Moriah from destroying the Temple Mount and bringing about the End of Days; a trapped Lynn takes matters into her own hands; and Billingham faces a flaw in his plan. In other events; Peter uncovers all the answers in the Emma Wilson case.moreless
An ancient religious sect is ready to enact its plan; Peter partners with unlikely allies; Lynn realizes the depth of the conspiracy while investigating Ridell; Golan tries to crack more clues from the Donaldson case; and Avram moves to protect his valuable asset.moreless
Lynn suspects that there may be a mole at the consulate; Margrove and Peter both head to a convent, but they have different goals; and Debbie returns to the compound seeking vengeance.
While Emma tells her story, Debbie concocts a plan to save Joshua, Charlie and herself and it involves a trip to a hardware store. Lynn learns that Peter has not left Jerusalem and a hidden VHS tape creates about as many questions as it answers.moreless
Cohen arrests Emma's suspected killer; Peter makes a startling discovery; Avram and the red heifer are kidnapped in Croatia; and Billingham tries to prevent Debbie and Josh from exposing his secrets.
A building collapses and TC, Drew and Gwen go to help the injured. When they get there, TC notices that a former army medic has already treated some of the injured. TC asks him to continue helping. In the hospital, Jordan helps a man who has a heart attack when he hears of the building collapse. Paul's father, a renowned neurosurgeon shows up and is pressuring Paul to go to Johns Hopkins and become a surgeon.moreless