Mark, Demetri and Wedeck try to connect Janis' attack with a separate attack made on them; Olivia confronts Mark about his experience; Demetri and Gough track down a clue from Mark's; Dylan goes missing from the hospital.

Mark's romantic getaway with Olivia is cut short when he gets a tip that leads him to the tattooed assassin in his flashforward; Aaron learns the truth about his daughter's accident; Janis goes back to work but is uncertain about her future with the department.