“Human For a Day” — Kara and her friends must rely on their inner strength and courage when an earthquake strikes National City, on SUPERGIRL, Monday, Dec. 7 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured left to right: Melissa Benoist and Luke Macfarlane Photo: Darren Michaels/Warner Bros. Entertainment Inc. © 2015 WBEI. All rights reserved.