History Recap / Supergirl2015S2E2TheLastChildrenOfKrypton

* BerzerkButton: J'onn nearly loses it when Clark accuses him of not caring for Kara as J'onn has made it clear in the past he regards the two Danvers sisters as surrogate daughters.

* FreezeFameBonus: When Winn has identified the location of promethium, the strongest material on Earth, the screen on his computer shows its apparent atomic composition: C[[subscript:12]]H[[subscript:22]]O[[subscript:11]]. Promethium would be better known on our world as "sugar".

* EurekaMoment: Win's offhand comment about it being difficult to calibrate the anti-kryptonite shielding he's making for Supergirl and Superman due to the trace amounts of it around the DEO inspires Alex to realize a way of identifying the mole who handled large quantities of it during the theft that delivered it to Cadmus.

* ChekhovsGunman: Some little girls are seen playing in Metropolis, including one in a Supergirl costume. Later, during Superman's fight with the second Metallo, the little girl in the Supergirl costume shows up again. [[spoiler: This time it's actually a shape-shifted Martian Manhunter.]]

* MythologyGag

** When Winn hears of this, he gives his own example to Alex. Citing his time in a foster home and how he was repeatedly told how lucky he was to have someone to take care of him, he says that family is not about "keeping score", but about loving one another, implying that Alex is rather [[EntitledToHaveYou entitled]] in thinking she has the right to act that way either.

* JerkassHasAPoint: While Snapper Carr does come off as a ''huge'' {{Jerkass}}, he's not wrong in stating that Kara has no place as a reporter when she has no experience and no education in the field of journalism.

* MythologyGag: The shot of Superman cradling Supergirl [[PietaPlagiarism in his arms]] mirrors the cover of ''ComicBook/CrisisOnInfiniteEarths'' #7.

* ShoutOut: Winn makes one to Yoda early in the episode.

* TravelingAtTheSpeedOfPlot: Before Kara and Clark heads of to face Metallo the first time they are with Alex in her apartment, dressed in her civilian wear. Next time we see her, she's at the D.E.O. HQ dressed in their uniform. ''Possibly'' justified if her comments in the previous episode that the new HQ is near her apartment are considered.

* SecondEpisodeIntroduction: Snapper Carr makes his debut. On a location example, this is also Metropolis' debut on this universe.

* ChestBlaster: Metallo can fire a Kryptonite beam from his chest core.

-->'''Winn''': ''(imitating Yoda's voice)'' [[Franchise/StarWars Do or do not, there is no try.]]

* KryptoniteProofSuit: Or chestplates, anyway.

* ShoutOut: Winn makes one to Yoda early in the episode.

* {{Irony}}: Cat explains she's leaving CatCo to explore new opportunities, to dive into new waters. [[RealLifeWritesThePlot Behind the scenes]], the actual reason is that Calista Flockhart actually ''doesn't'' want to leave her home (Los Angeles, where the first season was filmed) and is thus resistant to moving to Vancouver.
* NiceGuy: Clark is such a nice guy, he even turns his head when a bank robber tries hitting him, just to soften the damage to the guy's hand.

* ShootingSuperman: Naturally. Punching too. It gets {{Lampshaded}}:

* {{Shoutout}}: Winn makes one to Yoda early in the episode.

-->'''Superman:''' Now, see, if the bullets don't work, why the punching? ''{{beat}}'' Never understood that.

* Shout-out: Winn makes one to Yoda early in the episode.

* Shoutout: Winn makes one to Yoda early in the episode.