Mr. Mxyzptlk Gets Trigger Happy In New Supergirl Clip

Even though she has enough on her plate already with an unwanted suitor who won't take no for an answer, Supergirl still finds time to go after three thieves. And since most criminals in National City aren't very bright, this trio pulls out their guns and fire upon the Woman of Steel. Of course, like always, the bullets just bounce right off of her.

She should have them subdued in a moments notice, but then Mr. Mxyzptlk arrives and makes the situation ten times worse. With snap of his finger, he magically holds the thieves in one place and turns their guns on them. Things get really intense when he cocks back the guns' triggers.

Check it out in the sneak peek above!

When Mr. Mxyzptlk (guest star Peter Gadiot), a magical imp, shows up on Earth and declares his love for Kara (Melissa Benoist), she tries to let him down easy, thinking him harmless. However, he decides it's a challenge and starts to wreak havoc on National City. Mon-El (Chris Wood) has seen beings like Mr. Mxyzptlk on Daxam and knows how dangerous they can be. He and Kara argue over how to get rid of Mr. Mxyzptlk, further straining their relationship.

Meanwhile, Alex (Chyler Leigh) and Maggie (Floriana Lima) celebrate their first Valentine's Day together.

Stefan Pleszczynski directed the episode written by Jessica Queller & Sterling Gates.

MORE: Supergirl: First Look at Mr. Mxyzptlk! / Supergirl Recap with Spoilers - Luthors / Lena Luthor's Secret Origin Revealed

Distributed worldwide by Warner Bros. International Television Distribution, SUPERGIRL is executive produced by Greg Berlanti (Arrow, The Flash), Ali Adler (The New Normal), Andrew Kreisberg (The Flash, Arrow) and Sarah Schechter (Blindspot, The Mysteries of Laura). Supergirl is based on the characters created by Jerry Siegel and Joe Shuster and appearing in DC Comics, by special arrangement with the Jerry Siegel Family.

"Mr. and Mrs. Mxyzptlk" episode of Supergirl airs Monday, February 20 at 8 p.m. ET/PT.