History Recap / Supergirl2015S2E1TheAdventuresOfSupergirl

Superman joins up with Supergirl to investigate Lena Luthor, Lex's sister who is attempting to reinvent her brother's company as a force for good.

** Lex Luthor does not appear personally, but his influence is heavily felt on the episode.
** Both Perry White and Lois Lane call Clark on different occasions, but their voices are not heard.

* ArtisticLicensePhysics: A skyscraper can't possibly have just one single load-bearing point.

* BadassFamily: The Supercousins teamed-up throughout the episode to glorious results.

* ChristmasCake: Kryptonian culture had a ''very'' low threshold for this category as Kara mentions that at her age she would already be considered a spinster back in Krypton, although she may have been taking the time she spent in the Phantom Zone into account.

* EatingTheEyeCandy: Both Alex and Cat made subtle passes (well, the former at least) on Clark.

** The DEO mission that caused the falling out between J'onn and Clark involved a meteorite made of pure Kryptonite. [[Series/{{Smallville}} It's not the first time we've seen something like that.]]

* NotSoDifferent: Kara relates to Lena over wanting to prove themselves away from the shadows of their more (in)famous male relative.

* {{Retcon}}: As a result of the show's move to the CW and filming to Vancouver, the teaser scene at the end of last season's finale was reshot. At the end of Season One, the Kryptonian pod is seen passing by Kara's apartment before the scene cuts to her and J'onn landing beside the pod after it's already landed. The beginning of this episode adds a sequence of the two trying to stop the pod from crashing within the city. Also, there was a DEO office in the middle of National City, two blocks from Alex's apartment, the entirety of Season One that Kara (and the viewer) never knew about. That's now the setting of DEO scenes instead of the desert base.

** Alex "liking the new place than the old one" (Read: The ChannelHop from ''Creator/{{CBS}}'' to ''Creator/TheCW'' because the former doesn't want to renew them).

* WouldHitAGirl: John Corben spends majority of the episode trying to kill Lena. In his final attempt he fights Alex when she catches him, and was then about to fight Supergirl when Lena shoots him.

** Cat's lusting over Clark in the comics comes into play in the episode.
*** As well as in ''Series/Series/LoisAndClark''

* ChristmasCake: Kryptonian culture had a ''very'' low threshold for this category as Kara mentions that at her age she would already be considered a spinster back in Krypton.

* InSpiteOfANail: Corto Maltese becomes the second location shared by this Earth with [[Franchise/{{Arrowverse}} Earth-1]], with [[Franchise/TheFlash Central City]] being the first.

** Intergang, Corto Maltese, Kasnia, and [[Franchise/{{Batman}} Gotham]] get namedropped.

* TakeThat: After Cat derides Miss Tessmacher's intelligence, Kara protests that she can't be stupid because she went to Yale.

** Superman's first line to his cousin is "Need a Hand?", just like his first appearance in ''WesternAnimation/JusticeLeague''.

* {{Retcon}}: As a result of the show's move to the CW and filming to Vancouver, the teaser scene at the end of last season's finale was reshot. At the end of Season One, the Kryptonian pod landed in the desert during the day. In the recap of that scene in the Season Two opener, the pod landed near the city at night. Also, there was a DEO office in the middle of National City, two blocks from Alex's apartment, the entirety of Season One that Kara (and the viewer) never knew about. That's now the setting of DEO scenes instead of the desert base.

* Retcon: As a result of the show's move to the CW and filming to Vancouver, the teaser scene at the end of last season's finale was reshot. At the end of Season One, the Kryptonian pod landed in the desert during the day. In the recap of that scene in the Season Two opener, the pod landed near the city at night. Also, there was a DEO office in the middle of National City, two blocks from Alex's apartment, the entirety of Season One that Kara (and the viewer) never knew about. That's now the setting of DEO scenes instead of the desert base.

* AttackDrone: Corben makes use of them in his forst assassination attempt on Lena Luthor.

* InterspeciesRomance: Lois and Clark are conformed to be a couple in this episode. Interestingly, the episode also shows Kara and Jimmy's breakup.

* TheStinger: The first one since the Pilot, showing a mysterious woman from Cadmus injecting a fatally wounded Corben with what seems to be liquid Kryptonite, turning him into Metallo.
* StuffBlowingUp: This season premiere is jam packed with explosions from the Venture rocket ship's engine to the Luthorcorp Building.

* YouHaveOutlivedYourUsefulness: John Corben kills off the seller of the military drones by testing out the weapon systems.

** There are many references to the Richard Donner ''Film/{{Superman}}'' movie, including Cat's shouting for "Miss Tessmacher" and Lena Luthor stating that "statistically speaking, flying is still the safest way to travel."

** Intergang, Corto Maltese, and Kasnia get namedropped.

** At one point, someone tells Clark that he has some "steel underneath that Kansas wheat", alluding to Superman's traditional nickname, "The Man Of Steel"

** At one point, someone tells Clark that he has some "steel underneath that Kansas wheat", alluding to his Superman's traditional nickname, "The Man Of Steel"

* OOCIsSeriousBusiness: Cat Grant is uncharacteristically flustered around Clark, as she finds him attractive. Clark finds this amusing.

* WhamLine: "Today, John Corben dies. In his place rises Metallo!"

* WhamLine: "John Corben dies today. Long live Metallo."

* WhamLine: "John Corben is dead. Long live Metallo."

* OOCIsSeriousBusiness: Kat Grant is uncharacteristically flustered around Clark, as she finds him attractive. Clark finds this amusing.