Supergirl 3x15 In Search of Lost Time - Lena Luther "holds a mirror" up to Samantha to show her who and what she really is - the Worldkiller, Reign. <br /><br />Watch full episodes of Supergirl on The CW App: http://www.cwtv.com/shows/supergirl/<br /><br />Supergirl must work with J'onn to contain the chaos resulting from Myr'nn's psychic disturbances at the DEO; Mon-El teaches Kara fighting techniques he learned in the future for battling Worldkillers.<br /><br />Director: Andi Armaganian<br /><br />Writers: Jerry Siegel (based on characters created by), Joe Shuster (based on characters created by) <br /><br />Stars: Melissa Benoist, Mehcad Brooks, Chyler Leigh
