Warning: Full spoilers for the episode below. “Supergirl Lives” is notable not just for being Supergirl’s midseason premiere, but because it marks director Kevin Smith’s debut on the series. Honestly, apart from the presence of his daughter Harley Quinn as teen kidnap victim Izzy Williams and a reference to “Thanagarian Snare Beasts,” you wouldn’t know there was anything out of the ordinary about this episode.