The House of L Supergirl : Season 4 Episode 16
TV-PG The CW 43m int(0)
Aired: March 24th, 2019 @ 9:00 PM EST on The CW
In the wake of Lex Luthor's return, the show flashes back to what he's been doing for the last two years and how his secret machinations and plans have affected Supergirl and Lena.