Shadow Hunters Season 01 Episode 05

The Lightwood family matriarch, Maryse, arrives at the Institute with a Seelie intel mission for Isabelle and Jace. Alec is ordered to watch over Clary, but she escapes the Institute for her old apartment to locate her mother's secret box – that once belonged to a "Jonathan Clark". Clary and Simon are subsequently kidnapped by werewolves while searching the apartment, to Alec's chagrin. Clary is interrogated about the location of the Mortal Cup, and the alpha werewolf threatens to kill Simon if she does not reveal the information. Jace, Isabelle, and Alec then head to rescue the two, after Simon calls for help. The Shadowhunters are assisted in their escape by an unlikely ally – werewolf Luke, who defeats his alpha and assumes the title.