

Someone is out to get Simon and Jace is on the hunt to find out who it is. Clary and Izzy go after a rogue vampire and Simon hunts for a new apartment. Jace's concerns grow about his mental state and turns to Luke for information on his family's past. Alec decides to host a Lightwood family dinner at Magnus' house after a surprising visit from Maryse. Simon tries to figure out what the Seelie Queen did to him during his time in the glade. The Shadowhunters try to track down the new imposing threat, while Jace has a suspicion that Jonathan is back and behind the mundane attacks. The warlocks' magic is becoming corrupted by a demonic presence while Izzy and Luke try to track down more information on the recent series of possessions. Meanwhile, Lilith sets a plan in motion in New York City as Simon spends time in the Seelie Court. Alec pushes Jace to come clean about whatever Jace and Clary are hiding. Secrets abound as the Shadowhunters and Downworlders try to get back to normal after Valentine's death.

Chai Hansen as Jordan Kyle (11/22) (eps.Tessa Mossey as Heidi McKenzie (7/22) (eps.Javier Muñoz as Lorenzo Rey (7/22) (eps.Luke Baines as Jonathan Morgenstern (12/22) (eps.David Castro as Raphael Santiago (8/22) (eps.Isaiah Mustafa as Luke Garroway (21/22) (eps.Alisha Wainwright as Maia Roberts (16/22) (eps.Emeraude Toubia as Isabelle Lightwood (22/22).Matthew Daddario as Alec Lightwood (22/22).Dominic Sherwood as Jace Herondale (22/22).Katherine McNamara as Clary Fairchild (22/22).The Shadowhunters face a new level of evil that they can't even imagine with the return of Jonathan Morgenstern. While the Shadowhunters deal with changes in their personal lives and Clary and Jace keep dark secrets, a serious threat to the Shadowhunters emerges in the form of Lilith, a powerful demon building an army of disciples on a quest to resurrect her "precious boy" Jonathan.
