Supergirl’s changing Lanes tonight

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Here’s what’s up in the world of TV for Monday, March 6. All times are Eastern.
Top pick
Supergirl (The CW, 8 p.m.): Although the episode is titled “Exodus,” it boasts a new arrival, as Teri Hatcher will reportedly make her debut as some as-yet-unknown villain. (Could all those years spent dealing with Lex Luthor have warped Lois’ mind?) Elsewhere, Alex searches for Jeremiah, and there are two potential journalism coups: Kara’s investigation of a series of alien kidnappings, and a Snapper Carr exclusive with Supergirl herself. Resident muckraker and Supergirl reviewer Caroline Siede will get to the bottom of things.