Shadow Hunters Season 01 Episode 04

Simon quarrels with Jace and leaves the Institute. The Shadow hunters lure warlock Magnus Bane out of hiding with a prized necklace, in order to gain his help in retrieving Clary's memories. Magnus and Alec are instantly attracted to each other. Magnus informs them that he fed the memories to a memory demon for safekeeping. The Shadow hunters track Magnus to his lair, where the Circle has attacked. Magnus transports the group to his loft, where they summon the demon. Alec's personal insecurities about his feelings for Jace disrupt the ritual when they are each asked to relinquish a beloved memory, forcing Clary to kill the demon before recovering any memories. Simon is plagued with visions of Camille and ends up returning to the Hotel Dumort.