SPOILER WARNING: This article contains spoilers for "Changing," the latest episode of "Supergirl."
Mon-El is in serious trouble -- and not with Kara (this time). In "Changing," the latest episode of "Supergirl," Mon-El decided to embrace his inner hero, but not before having a few squabbles with Supergirl. However, that heroic streak has landed him in more trouble than he bargained for.
Throughout the episode, Kara and Mon-El went back-and-forth over Mon-El's plans for work and whether or not he'll ever use his powers for good. Of course, they both have different definitions of the word "good." Mon-El went and found a job, just as Kara suggested, but it wasn't exactly what Kara envisioned; when she found out he had become hired muscle, she became very upset with him and flew off, leaving him to reflect on why she was so upset that he didn't want to be a hero just like her.
When it come down to the wire, however, he managed to find it in himself to step up -- and just in the nick of time, too. With Kara down and out thanks to Parasite's power-sucking abilities, Mon-El stepped in to fight when National City needed him most, and he wasn't alone. James Olsen's Guardian also made his debut, costume and all, and together the two were able to hold Parasite back until Supergirl could land the finishing blow. Fortunately for James, Winn outfitted the armor with lead, which meant that Supergirl couldn't simply see through it to discover Guardian's true identity.
Mon-El seemed to enjoy his brush with heroism, because he sought to continue that streak by helping out a homeless man on his way back to the DEO. Unfortunately, the homeless man wasn't what he appeared to be; he was, in fact, an agent of Cadmus, and he delivered a blow that pushed Mon-El right into Cadmus' hands. Cadmus smuggled the stunned Mon-El into their van and peeled off, but not before Lena Luthor's mother Lillian -- aka the Doctor -- glanced at the camera in the sideview mirror.
Starring Melissa Benoist as the Girl of Steel, "Supergirl" airs Mondays at 8 pm ET/PT on The CW. The series also stars David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers and Jeremy Jordan as Winn Schott and features appearances by Calista Flockhart's Cat Grant as well as Tyler Hoechlin's Superman.