<Tr> <Th> 36 </Th> <Td> 10 </Td> <Td> "The Fall" </Td> <Td> Carlton Cuse </Td> <Td> Carlton Cuse & Chuck Hogan </Td> <Td> October 30, 2016 (2016 - 10 - 30) </Td> <Td> XSN03010 </Td> <Td> 0.89 </Td> </Tr> <Tr> <Td_colspan="8"> Palmer and Setrakian devise a plan to lure the Master to Stoneheart headquarters so that Eph, Fet, Dutch, Setrakian, and Quinlan can entrap him in the silver - lined sarcophagus . However, the Master, who has taken a new body, ambushes Palmer and transfers his essence into him, gaining Palmer's memories . The Master retrieves the remaining nuclear bomb from Palmer's vault and revives the mortally wounded Eichhorst . The latter leaves to plant the bomb in the Statue of Liberty, giving Kelly the detonator that is later taken by Zach . Eph and Setrakian meet with Palmer but quickly realize it is the Master and battle him . Dutch activates the strigoi disruption device, crippling the Master; Quinlan, Fet, Eph, and Setrakian seal the Master into the silver - lined sarcophagus . Eph, slightly wounded, stays behind to treat himself, as the others take the sarcophagus to dump it into the Atlantic . Kelly, accompanied by Zach, enters Palmer's office and attacks Eph, forcing him to kill her in self - defense . Enraged over his mother's death, Zach vengefully detonates the bomb . The explosion's shockwave frees the Master from the sarcophagus, and the resulting nuclear debris obscures the sun, allowing the strigoi to walk freely in daylight . Eichhorst leaves with Zach, while Setrakian's group is forced underground to avoid nuclear fallout and rampaging strigoi . Outside amid the chaos, Eph searches for Zach . </Td> </Tr> <Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Teleplay by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 37 </Th> <Td> </Td> <Td> "The Worm Turns" </Td> <Td> J. Miles Dale </Td> <Td> Carlton Cuse & Chuck Hogan </Td> <Td> July 16, 2017 (2017 - 07 - 16) </Td> <Td> XSN04001 </Td> <Td> 1.44 </Td> </Tr> <Tr> <Td_colspan="8"> Nine months have passed since "Illumination Day," the day the bomb was detonated, creating a nuclear winter . The strigoi, now freely roaming the streets in the dim daylight, have enslaved humanity and established a dictatorship called, "The Partnership," aided by human collaborators . Quinlan, Fet, and his new companion, Charlotte, are in North Dakota searching for nuclear weapons to destroy the strigoi . When a trio of female survivalists capture Fet and Charlotte, Fet meets Daniel Roman, a fellow captive and a military officer formerly stationed at a nearby missile silo . Quinlan frees them and the group heads for the missile silo . Meanwhile, in Philadelphia, Eph anonymously works odd jobs to survive . Captured by the Master's forces, Eph is freed when the bus transporting him and other human prisoners is blown up by Jason, a resistance fighter . Eph, the only survivor, helps the wounded Jason get away . Alex, Jason's sister, bargains with Eph to stay on until Jason recovers . Over Eichhorst's objections, the Master continues grooming Zach, saying he has dark potential . </Td> </Tr> <Tr> <Th> 38 </Th> <Td> </Td> <Td> "The Blood Tax" </Td> <Td> J. Miles Dale </Td> <Td> Liz Phang </Td> <Td> July 23, 2017 (2017 - 07 - 23) </Td> <Td> XSN04002 </Td> <Td> 0.91 </Td> </Tr> <Tr> <Td_colspan="8"> Gus and Alonso Creem are operating a black market operation . While looting a supply facility where his cousin works, Gus and his team are discovered but get away . When Creem objects to Gus returning with his cousin, Gus insists he stays . Dutch is held captive in a facility run by Sanjay Desai where women whose blood type is B+ are used for breeding . Dutch and another woman are caught attempting to escape . Flashbacks show her and Setrakian being captured during a strigoi - led round - up, then were separated . Dutch re-hid the Lumen before being caught . When the Philadelphia resistance group's operations base is uncovered, Eph offers them another hideout . He stays on after the group agrees to intensify their anti-strigoi attacks . </Td> </Tr> <Tr> <Th> 39 </Th> <Td> </Td> <Td> "One Shot" </Td> <Td> Kevin Dowling </Td> <Td> Bradley Thompson & David Weddle </Td> <Td> July 30, 2017 (2017 - 07 - 30) </Td> <Td> XSN04003 </Td> <Td> 0.86 </Td> </Tr> <Tr> <Td_colspan="8"> Fet, Charlotte, Quinlan, and Captain Daniel Roman locate the nuclear warhead . Quinlan is wounded by a soldier guarding the missile silo but will recover . The strigoi have removed a key detonating component, and the group sets out to retrieve it . In Philadelphia, Eph and the resistance fighters poison a container truck of human blood intended for strigoi consumption . Over two thousand stigoi are fatally poisoned but the mission's success alerts the Master and Eichhorst to Eph's whereabouts . Meanwhile, Zach, bored and lonely, befriends Abby, the young girl working as a maid at his building . The Master, suspecting Zach's allegiance is faltering, tells him he can either support his cause or leave and live hand - to - mouth like other humans . Zach reaffirms his loyalty to the Master . Eph discovers that the strigoi are transporting unknown cargo to various towns via the railroads . </Td> </Tr> <Tr> <Th> 40 </Th> <Td> </Td> <Td> "New Horizons" </Td> <Td> Kevin Dowling </Td> <Td> Mickey Fisher </Td> <Td> August 6, 2017 (2017 - 08 - 06) </Td> <Td> XSN04004 </Td> <Td> 1.17 </Td> </Tr> <Tr> <Td_colspan="8"> Eichhorst orders Desai to shorten the womens' pregnancies to six months so they can produce two infants per year . Infant B+ blood is a strigoi delicacy . Desai forces Dutch to coach women during their deliveries . Meanwhile she plots to steal an employee key card to escape . Strigoi invade the school building where Eph, Alex, and the other resistance fighters are hiding out . Jason, Alex's brother, is infected, forcing Eph to shoot him . Eph and Alex find another hideout where Eph reveals to Alex his and Zach's involvement in "Illumination Day ." He discovers that the strigoi are using trains to transport human volunteers, under the guise of recruiting workers for "New Horizons Farms". A rival gang hits Gus and Creem's black market operation, claiming their territory . Gus locates their lair and discovers they are fully - armed, ex-NYPD cops . He coordinates and leads a successful counter-attack, killing them and capturing their merchandise . At the birth center, Dutch attacks Desai and takes his key card . While attempting to escape, she accidentally runs into the processing facility where humans' blood is being drained . </Td> </Tr> <Tr> <Th> 41 </Th> <Td> 5 </Td> <Td> "Belly of the Beast" </Td> <Td> Norberto Barba </Td> <Td> Jeff Wadlow </Td> <Td> August 13, 2017 (2017 - 08 - 13) </Td> <Td> XSN04005 </Td> <Td> 0.93 </Td> </Tr> <Tr> <Td_colspan="8"> After Eichhorst recaptures Dutch, she learns that the Partnership is holding Setrakian as a medical test subject . She rescues him, severely injuring Eichhorst as they escape . Fet, Quinlan, Charlotte, and Roman successfully attack a Partnership convoy and retrieve the nuclear missile's detonating component . During flashbacks to 19th - century London, Quinlan encounters Louisa, a woman who hopes to use his powers to revive her dying brother, and who is strongly attracted by his monstrous nature; it is revealed the Master arrived in London at that time . In the present, Eph and Alex travel to the countryside to continue investigating the Master's New Horizons "farms". They discover these are concentration camps to house humans as livestock for strigoi consumption . Speaking through a newly - turned strigoi, the Master taunts Eph, saying Zach is alive and has dark potential . </Td> </Tr> <Tr> <Th> 42 </Th> <Td> 6 </Td> <Td> "Tainted Love" </Td> <Td> Norberto Barba </Td> <Td> Paul Keables </Td> <Td> August 20, 2017 (2017 - 08 - 20) </Td> <Td> XSN04006 </Td> <Td> 0.79 </Td> </Tr> <Tr> <Td_colspan="8"> Zach is upset to discover that Abbey has a boyfriend . When she rebuffs him, saying he is too young, he allows his Feeler bodyguard to turn her when she attempts to leave . In flashbacks to 19th - century England, Quinlan is part of Louisa and her daughter, Lydia's family . Upon learning the Master is in London, he leaves to battle him, ignoring Louisa's pleas to stay . When he hesitates striking the fatal blow due to his attachment to his new family, the Master escapes and turns Louisa and Lydia, forcing Quinlan to release them . In the present, Quinlan demands that Fet leave Charlotte behind before they leave for New York with the nuclear weapon, fearing she will distract Fet from their mission . When Fet broaches the subject to Charlotte, she claims she never intended to accompany him there . The group procure a plane to fly to New York . Before Fet boards, Charlotte pleads with him to come with her; he refuses to abandon the mission and departs with Quinlan and Roman . Eichhorst, pursuing the group, attempts to shoot down the plane but Charlotte shoots him . </Td> </Tr> <Tr> <Th> 43 </Th> <Td> 7 </Td> <Td> "Ouroboros" </Td> <Td> Thomas Carter </Td> <Td> Andy Iser </Td> <Td> August 27, 2017 (2017 - 08 - 27) </Td> <Td> XSN04007 </Td> <Td> 0.89 </Td> </Tr> <Tr> <Td_colspan="8"> Fet, Quinlan, and Roman land in Long Island and head to Manhattan with the nuclear warhead . To stop them, Desai destroys all bridges and tunnels into Manhattan . Setrakian and Dutch retrieve the Lumen before finding a new hideout . Setrakian discovers a clue within in the Lumen symbols before he collapses . Eph returns to New York with Alex and reunites with Dutch and Setrakian . Eph treats Setrakian with free medical supplies from Gus . Creem, angry over Gus' generosity, tries cutting a deal with the Master in exchange for Setrakian's location but he is turned instead . Setrakian gives Eph the formula to make him the restorative white . While Eph and Dutch are away, Setrakian has another revelation about the Lumen but Eichhorst and Creem arrive . Alex is killed and Eichhorst beats Setrakian . Gus, with Raul, returns to Setrakian's hideout, forcing Eichhorst to flee . Raul is killed and Creem ambushes Gus . Setrakian impales Eichhorst, saving Gus, who kills Creem . Eichhorst stings Setrakian and starts draining him, but Setrakian has taken a massive dose of the blood thinner that Eph gave him, poisoning his old foe . Setrakian speaks to the Master through Eichhorst, warning that the Master's defeat is inevitable . He then beheads Eichhorst . </Td> </Tr> <Tr> <Th> 44 </Th> <Td> 8 </Td> <Td> "Extraction" </Td> <Td> Paco Cabezas </Td> <Td> Liz Phang </Td> <Td> September 3, 2017 (2017 - 09 - 03) </Td> <Td> XSN04008 </Td> <Td> 1.01 </Td> </Tr> <Tr> <Td_colspan="8"> Eph and Dutch return to the hideout to find Eichhorst, Alex, and Creem are dead and Setrakian infected and dying . Fet, Quinlan, and Roman procure a boat and sneak the nuclear bomb into Manhattan and hide it at the Federal Reserve Bank . Fet and Quinlan leave Roman to guard the bomb, then locate the others at the hideout . Setrakian shares that rather than using the bomb, the Master can be defeated by separating him from his collaborators . Setrakian then asks to be released, and Quinlan beheads him . Eph, Dutch, Fet, Gus, and several cohorts infiltrate the blood center, freeing the captives and apprehending Desai to uncover the Master's whereabouts . Meanwhile, the Master tasks Zach with an important mission . Eph learns that Zach has been spotted near the market by Harlem River and finds him there . </Td> </Tr> <Tr> <Th> 45 </Th> <Td> 9 </Td> <Td> "The Traitor" </Td> <Td> Jennifer Lynch </Td> <Td> David Weddle & Bradley Thompson </Td> <Td> September 10, 2017 (2017 - 09 - 10) </Td> <Td> XSN04009 </Td> <Td> 0.84 </Td> </Tr> <Tr> <Td_colspan="8"> Fet and Dutch interrogate Desai, to no avail . However, after Quinlan threatens to drain his wife, Desai reveals the Master's location . Gus arrives to help Roman guard the bomb and also gather silver from the Federal Reserve Bank for weapons against the strigoi . Meanwhile, Eph doubts Zach's account of his time with the Master . When Zach purposely leaves a blood scent for the Feelers, Eph realizes his betrayal . Zach confesses he lied and offers to spare his father if he tells him where the nuke is hidden . Eph almost kills Zach but leaves him behind when the team immediately evacuate and meet up with Gus and Roman . The Master arrives and berates Zach for his failure . To save himself, Desai falsely accuses his wife of betraying the Master, but the Master kills both . The team sets off to detonate the nuke at the Empire State Building . Quinlan enters with the detonator, finding the Master gone . When strigoi surround him, he radios the others to leave, but a strigoi horde blocks their escape . </Td> </Tr> <Tr> <Th> 46 </Th> <Td> 10 </Td> <Td> "The Last Stand" </Td> <Td> J. Miles Dale </Td> <Td> Chuck Hogan & Carlton Cuse </Td> <Td> September 17, 2017 (2017 - 09 - 17) </Td> <Td> XSN04010 </Td> <Td> TBD </Td> </Tr> <Tr> <Td_colspan="8"> Eph, Fet, and Dutch escape with the nuke while Gus and Roman hold off the strigoi horde . The former regroup with Quinlan and devise a plan to lure the Master into a subterranean tunnel deep beneath the city, where they will detonate the nuke . To Dutch's dismay, Fet volunteers to detonate the bomb, sacrificing himself . Dutch reveals her feelings for him, but his resolve remains unchanged . The Master orders a final purge of Manhattan to flush out the team and the nuke, an act that shocks Zach . Eph and Fet draw out the Master by deliberately revealing themselves to strigoi . Gus and Roman rejoin the group, just before the Master and Zach lead a strigoi hoard to assault their hideout . Quinlan forces the Master into the tunnel, along with Zach . Eph steals the detonator and follows them in a separate elevator, sacrificing himself in Fet's place . The Master fatally injures Quinlan after a vicious battle . Zach, unable to kill his father on The Master's order, instead shoots The Master . The Master, wounded, attempts to transfer his essence (the red worm) to Zach, but Eph tackles him, so the Master possesses him instead . Before the Master can fully take control, Eph arms the detonator and embraces Zach . The Master thinks he has won, but Zach triggers the nuke, destroying himself and, finally, the Master . Five years later, humanity has recovered and destroyed almost all but a few strigoi, who are mindless captive animals without the Master's control . The nuclear winter is gradually subsiding, and New York City is flourishing . Roman becomes a property developer helping to regenerate the city; Gus helps resettle refugees in the countryside and hopes to find Ana; Dutch and other former hackers work to restore the Internet; and Fet returns to being an exterminator, noticing rats have returned to the sewers now that the strigoi are gone . Fet and Dutch reunite . In voiceover Fet remarks the Master attempted to use love to spread his strain, but love instead proved to be humanity's salvation . </Td> </Tr> </Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Teleplay by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr>

When does the last season of the strain start