For all the "big bads" and natural near-disasters Kara's (Melissa Benoist) faced over five seasons of CBS-to-The CW series Supergirl, this Sunday she runs into the one threat even she can't defeat – the one "beast" that makes other networks' schedules tremble in fear…
But that doesn't mean it's too early to look ahead to next Sunday, with "Back from the Future – Part Two" hitting screens on February 16 – and not a moment too soon. Working with Lex (Jon Cryer) for the "bigger picture" defeat of Leviathan and then revealing the truth to Winn (Jeremy Jordan), Brainy (Jesse Rath) finds himself having to decide how far he will go – and who he will sacrifice – to save the world:
"Supergirl" season 5, episode 12 "Back From the Future — Part Two": BRAINY MUST CHOOSE BETWEEN ALEX AND LEX; JEREMY JORDAN GUEST STARS – Supergirl (Melissa Benoist) helps Winn (guest star Jeremy Jordan) face his greatest fear. After Alex (Chyler Leigh) sets out to find evidence against Lex (guest star Jon Cryer), Brainy (Jesse Rath) must decide between helping his friend or continuing to secretly work for Lex. Alexis Ostrander directed the episode, written by Rob Wright and J. Holtham.
Kara will take on a new menace this season that might be as polar opposite of Lex as you'll find, with Thomas Lennon (The State, Reno 911!) joining the cast as magical master of mayhem Mxyzptlk. Previously portayed by Peter Gadiot during a second season two-parter, "Mxy's" change into Lennon will be explained though his shape-shifting, 5th Dimension magic.
Pronounced "miks-yez-PIT-əl-ik", the little mischief-maker has been haunting Superman (and his extended family) since the mid-1940's. Portrayed mostly as a prank-causing, fun-seeking foil (except for Alan Moore's disturbing take, to no one's surprise), Mxyzptlk always had the potential to be a serious problem for Kryptonians considering their weakness to magic. Looks like viewers will get a chance to see if Lennon's Mxyzptlk lives up to that "potential".