Carousel (S01E11)

Logan is struck by a dart that wipes his memory, shot by men lurking behind a tree. He’s soon taken captive by Francis and another Sandman, who bring him back to the City of Domes to prepare for Carousel, where he’s expected to testify that sanctuary doesn’t exist. Meanwhile, Rem and Jessica are captured by a man from an unnamed city, who reveals that Logan is in "transit," a method used to neutralize threats through temporary memory loss instead of violence. Rem and Jessica must urgently devise a plan to rescue Logan from the City of Domes before time runs out.