Tasked to carry out dangerous missions, Hyun-su heads back to retrieve Han Du-sik. Sang-wook stops at nothing to finish what he started.
Critical information about the monsters is made public. When residents are split on what to do with Hyun-su, Lee Eun-hyeok suggests they hold a vote.
An unexpected savior protects the children from harm as Hyun-su, together with Yoon Ji-su and Jung Jae-heon, tries to bring them to safety.
As a state of emergency is declared, the residents tie up Pyeon Sang-wook for being bitten. Hyun-su is unable to ignore a family in distress.
Cha Hyun-su moves into the run-down Green Home by himself. Not long after, he witnesses a disturbing sight in his neighbor's apartment.
A military leaflet promises a route to safety, but the group is reluctant to trust it. Hyun-su is exposed to a new perspective on his condition.
When a team of outlaws takes over the building, the residents are shown how humans can be even more barbaric than the monsters.
Having little options in her state of being, Ji-su agrees to take a big risk. Yi-kyung returns to Green Home just in time.
Frank struggles after Joe Hill's lineage as a Reagan is revealed; Erin and Anthony receive gift-wrapped evidence; Danny's opposition to authority clashes with Jamie's adherence to the rules, as both brothers work to solve a murder.
Amber celebrates the holidays and musical guest Darius de Haas performs an original song.
One week before their big decision, Dr. Nicole has the couples discuss their visions for the future. Tamika and Vince seek to reconcile after a fight, Che and Michael consider his son moving in, and Ashley and Hollywood feud over her date.
Apple and Onion need to find power to plug in their new drone shoes.
Apple and Onion build eye masks to sleep at work so they can have more time for fun.
Apple and Onion need more room in a packed nightclub in order to bust their dance moves.
Apple and Onion have to get rid of Burger's roommate so Burger will help them.
Izzie and Catherine conclude their south-west odyssey with a tour of Devon, Somerset and Dorset. Izzie settles on a riverbank in a top secret location on the lookout for a very rare animal. Catherine meets some pioneering artists.
Rob, Chanel and Steelo ride some "Dread Sleds," see who's on "The Naughty List" and experience "New Year's Grief."