There’s nothing like a death in the family to put a halt on alien plans for world domination. Supergirl is asked to participate in her aunt Astra’s funeral at the behest of her widower Non, who says he will observe the traditional two-week Kryptonian mourning period before ramping up his evil plans again. At work, Kara is dismayed to find that Cat Grant is not only obsessed with finding the missing Max Lord (who is still locked up in a DEO prison), but she’s also hired a conniving new employee, Siobhan Smythe, to pick up the slack from her oftenabsent assistant. Meanwhile, an Alex-led DEO strikeforce closes in on another Fort Rozz escapee, only to find that flesh-eating alien has already fallen prey to an armoured, high-tech baddie known as the Master Jailer–a hunter of aliens who considers himself judge, jury, and executioner when it comes to extraterrestrials. The Master Jailer’s methods have everyone in National City considering the morality of their actions–James begins to question the ethics of Max Lord’s incarceration without trial, while Alex may not be able to keep quiet about the fact that it was her, not Hank, that killed Astra.
The newest Supergirl episode is packed with comic book shout-outs: the Master Jailer is a classic villain who first appeared back in 1979’s Superman #331 to menace Kara’s cousin. Early on in the episode, Alex speculates that National City’s newest super-criminal might be an alien bounty hunter, and Hank replies, “If it was him, we’d know.” Could this be a reference to DC fan favourite Lobo? The name Siobhan Smythe will ring a bell to DC readers, as it’s the alter ego of another classic DC villain who is set to debut on Supergirl in the coming weeks. Confronting the Master Jailer for the first time, Supergirl remarks that she thought masks were only big in “that other city”. Gotham, perhaps? And finally, this week’s episode was directed by Lexi Alexander, who brought another vigilante, this time from the competition at Marvel, to the big screen in 2008’s Punisher: War Zone.