Season 3A wrapped its run May 15, 2018. Shadowhunters will conclude its saga with the upcoming second half of season three (Season 3B ) and an epic two-episode special finale. Coming in spring 2019, twelve all-new episodes will culminate in a two-hour series finale event to wrap up the tale of the Shadowhunters and Downworlders that fans have loved over the past three seasons.

Based on the bestselling young adult fantasy book series The Mortal Instruments by Cassandra Clare, "Shadowhunters" follows 18-year-old Clary Fray, who finds out on her birthday that she is not who she thinks she is but rather comes from a long line of Shadowhunters – human-angel hybrids who hunt down demons. When her mother, Jocelyn, is kidnapped, Clary is thrown into the world of demon hunting with mysterious Shadowhunter Jace and her best friend, Simon. Now living among faeries, warlocks, vampires and werewolves, Clary begins a journey of self-discovery as she learns more about her past and what her future may hold.