Shadowhunters premiered on television.
Shadowhunters ( also known as Shadowhunters : The Mortal Instruments ) is an American fantasy television series that is loosely based on The Mortal Instruments by Cassandra Clare , and developed for television by Ed Decter . The show received a straight-to-series order on March 30 , 2015 , and premiered on January 12 , 2016 on Freeform .