CAREFUL! THESE SPOILERS ARE KILLER!!

Newcomer Sam Underwood portrays twin brothers Luke (pictured) and Mark who have obvious parental detachment issues
Joe is living the quiet life in a trailer community with a woman who knows about him and what he has done. She could be a possible member. The FBI tries to deduce the difference between the two murders. At the hotel, Carlos is still in hiding from the FBI with Jazelle. Mark and Luke visit the Fisher where they attack a couple and kidnap their son. Hardy speaks with Lily Gray who tells her that Weston already talked to her. She has seemingly intimate knowledge about Ryan Hardy and Joe Carroll. Emma is in search of Carlos. Twins Luke and Mark have dinner with the dead couple just as they did with Heather. Ryan returns to his apartment. His niece Max is there where she tries to convince him to tell the FBI all the information he has on Joe Carroll. Mark and Luke set up the parents just as they did with Heather. Luke calls Ryan and talks to him briefly before hanging up when Ryan mentions Joe’s name. Max traces the call. Ryan arrives at the address only to find the cell phone Luke used on the roof. Luke calls it from a house across the alley. Hardy spots him and heads for the home. Inside, he finds the bodies of the parents propped up in chairs in the living room. Investigating a noise upstairs, Ryan finds the couple’s son hiding in a closet. Joe is watching a report about himself with Mandy. Meanwhile, the FBI grills Hardy on his knowledge about Carroll which Hardy keeps secret. Luke calls Hardy and tells him that he has been following Ryan and the subway attack survivor Lily Gray.
The reverend discovers Joe’s identity and tries to flee only to be stopped by Joe and Mandy. Ryan arrives at the museum where he receives a call from Mark. He spots Mark, who he thinks is Luke, and chases him but he disappears into the crowd. Ryan finds a FBI agent and tells him to find Lily. Elsewhere in the museum, Lily is found by Luke and Mark wearing Joe Carroll masks. The man she is with tries to defend her but he is stabbed. While she flees, Lily runs into Ryan. Ryan goes back and finds the injured man. He is attacked by a follower in a Joe Carroll mask. Ryan unmasks him revealing Mark. He is then attacked by Luke and is surprised that they are twins. Luke and Mark escape with Hardy shooting at them. Afterward, Weston chews Ryan out for acting recklessly. Emma manages to contact Carlos who asks her if she is with Joe. In the trailer park, Joe Carroll kills the reverend with Mandy watching. Seeing Mandy become upset, he consoles her.

Ryan Hardy (Kevin Bacon) has seemingly begun to have a relationship with subway attack survivor Lily Gray (Connie Nielsen) who might be the medication for his grief over Claire Matthews death
More insight into twin brothers Luke and Mark is revealed. After killing and setting up a couple like human sized dolls, Luke speaks to the husband as if he were his father. Clearly, these two have some serious daddy issues just like Emma who had issues with her mother. I wouldn’t doubt they killed their father because they felt he wasn’t giving them the attention they felt was deserved. When he is contacted by Luke, Ryan suspects that the twin has parental problems and that Luke expects Joe will treat him like a son. The mention of this touches a nerve in Luke who plucks at Ryan’s strings by mentioning his failure to protect Claire. Luke and Mark are very cunning and extremely careful which makes them formidable against Ryan Hardy.

Is Joe Carroll (James Purefoy) addicted to murder?