 Lukesh then returns to the alleyway where Doggett was shot and vanishes . Based on the contradictory evidence , Reyes concludes that Lukesh can travel between parallel universes in order to kill . She also concludes that the unharmed Doggett disappeared because two versions of the same person cannot exist in the same universe . Skinner questions Lukesh , who becomes agitated when his mother is mentioned . Noting this , Skinner decides to hint that his mother will be questioned , which leads Lukesh to become more uncomfortable . Lukesh returns home to find his mother has found the gun with which he shot Doggett . After she threatens to talk to the FBI , Lukesh kills her . 
