"Manhunter" -- J'onn J'onzz reveals the details of meeting Kara and Alex's father, Dr. Jeremiah Danvers (Dean Cain, left), and assuming Hank Henshaw's identity, on SUPERGIRL, Monday, March 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Frame Grab: é 2016 WBEI. All rights reserved.