As the #SaveShadowhunters campaign rolls on, the showrunner and cast of Shadowhunters are tending to business as usual and have filmed the final episodes of the Freeform series based on fantasy novels Mortal Instruments — and they took to social media to document their last hurrah. Showrunner Todd Slavkin and cast…

Matthew Daddario (Delivery Man) and Isaiah Mustafa (Horrible Bosses) are the latest to join the cast of Shadowhunters, ABC Family's straight-to-series drama based on the bestselling young adult fantasy book series The Mortal Instruments by Cassandra Clare. The series, whose first episode is directed by McG, follows…