History Recap / ArrowS8E8CrisisOnInfiniteEarthsHourFour

* ThePowerOfTrust: The Spectre repeatedly asking if Barry trusts him. Barry doesn't even hesitate in affirmation.

* ShoutOut: Ryan finds Oliver's new outfit to be similar to that of a [[Franchise/StarWars Sith]].

* VoiceOfTheLegion: How Oliver as the Spectre sounds.

* YouAreBetterThanYouThinkYouAre: Kara gives a still self-doubting Ryan how he lives up to being a Paragon. The latter even lampshades that she might as well be the Paragon of Pep Talk.

* MythologyGag: Kara holding the remnants of Superman's outfit in a HeroicBSOD is a reversal of the iconic ''Crisis'' cover of Superman holding Supergirl's dead body.

* ShoutOut:
** DCEU Barry mistakes Earth-1 Barry for a cosplaying fan and offers to do a selfie. By the time this episode aired, superheroes in the DC Extended Universe had grown accustomed to doing selfies with fans, as seen in ''{{Film/Aquaman|2018}}'' and ''{{Film/SHAZAM|2019}}''.
** Ryan finds Oliver's new outfit to be similar to that of a [[Franchise/StarWars Sith]].

* {{Catchphrase}}: Oliver finishes of the Anti-Monitor with a truly epic "You have failed this universe!".

* HeroicSacrifice: During their confrontation, Oliver-as-Spectre obliterates the Anti-Monitor in a final show of force, sacrificing [[DeaderThanDead his soul to do so]].

* LeaningOnTheFourthWall: This is technically still an ''Arrow'' episode. The show that introduced us to Oliver Queen, and ultimately the Arrowverse at large, is a fitting place for his final farewell.

* CallBack: Several of them, as the Speed Force brings the heroes to important points of time in their lives

--->'''DCEU Flash''': What the hell is this?
--->'''Earth-1 Flash''': I'm asking myself the same question...literally. This can't be happening. What are you doing here?
--->'''DCEU Flash''': Well, I'll tell you that when you tell where "here" is.

** DCEU Barry mistakes Earth-1 Barry for a cosplaying fan and offers to do a selfie. By the time this episode aired, superheroes in the DC Extended Universe had grown accustomed to doing selfies with fans, as seen in ''Film/Aquaman2018'' and ''Film/SHAZAM2019''.

* YearInsideHourOutside: Inverted. While the Paragons are stuck in the Vanishing Point, Barry is shown being flung out of the Speed Force and he learns that he's been gone for months. From his perspective, however, mere seconds have passed.

* TheCameo: While stuck in the Speed Force, Barry meets [[Creator/EzraMiller his counterpart]] from the Franchise/DCExtendedUniverse, who is unaware of the Crisis On Infinite Earths.
--->'''Earth-1 Flash''': You don't know about the...
--->'''DCEU Flash''': Oh, God, don't do this to me. I 'don't know about the' what?

* CuttingTheKnot: After catching up to Lex, Kara declares she'll figure out what his plan is. Lex tells her she could just ''ask'' him to tell her. So she does. And he does.

* DespairEventHorizon: After the TimeJump from the last episode, Kara and Sara are noted by Ryan to have lost all hope. They later regain it after Barry's return and Oliver appearing before them.

* CallBack: Several of them, as the Speed Force brings the heroes to important points of times in their lives

* {{Flashback}}: At the beginning, there is one 10000 years back to Planet Maltus, when Mar Novu and his wife unwillingly brought the Anti-Monitor to this universe. Kara, Ryan and Lex later time travel to this point.

* GenreSavvy: Lex muses about the possible dangers on an alien world, like {{Chest Burster}}s, then asks if Kara has ever seen a movie.

* InsufferableGenius: Lex, naturally. Ryan finds it v ery hard to work with him.

* NiceJobBreakingItHero: Mar Novu trying to travel to the dawn of time opened the breach to the Antimatter-Universe and brought the Anti-Monitor to this universe.

* YouAreBetterThanYouThinkYouAre: Kara gives a still self-doubting Ryan a pep talk. The latter even lampshades that she might as well be the Paragon of Pep Talk.

* ShoutOut: DCEU Barry mistakes Earth-1 Barry for a cosplaying fan and offers to do a selfie. By the time this episode aired, superheroes in the DC Extended Universe had grown accustomed to doing selfies with fans, as seen in ''Film/Aquaman2018'' and ''Film/SHAZAM2019''.

* WhamShot: The aforementioned cameo from Ezra Miller, made that much more impactful for being kept secret until the episode's broadcast.[[note]]Since unlike Tom Ellis, Ezra managed to completely avoid being spotted at the filming location.[[/note]]

* YearInsideHourOutside: Inverted. While the Paragons are stuck in the Vanishing Point, Barry is shown being flung out of the Speed Force and he learns that he's been gone for months. From his perspective, however, mere seconds have passed.

* YearInsideHourOutside: Inverted. Barry's time in the Speed Force is brief from his perspective, but three months pass for the outside world.

* HoldTheLine: The Paragons have to hold off the Anti-Monitors shadow demons long enough for Oliver to destroy the Anti-Monitor and reboot the multiverse.

* TheCameo: While stuck in the Speed Force, Barry meets {{Creator/EzraMiller his counterpart}} from the Franchise/DCExtendedUniverse, who is unaware of the Crisis On Infinite Earths.

* EleventhHourSuperpower: Oliver's stint as the Spectre that also happens to be his swansong.
* AllForNothing: Ryan Choi is able to convince Novu from opening the gate into the Anti-Matter universe, despite Luthor's cajoling. However, they still arrive in the Anti-Matter universe and are told by the Anti-Monitor himself that, despite convincing ''that'' Novu not to open the gate, there's always one Novu who will ignore that warning and pop it open.
* TheCameo: While stuck in the Speed Force, Barry runs into the Franchise/DCExtendedUniverse version of himself, who was also caught in the Speed Force.
* DeaderThanDead: Killing the Anti-Monitor obliterates Oliver's very soul, making resurrection impossible by any means known in-universe.

* GoodFeelsGood: Luthor actually liked at the feeling of doing something heroic.

* HeroicSacrifice: Oliver-as-Spectre grapples with the Anti-Monitor and, in a final show of force, obliterates him, but sacrificing [[DeaderThanDead his soul to do so]].

* LeaningOnTheFourthWall: This is technically still an ''Arrow'' episode. The show that Oliver comes from is obviously a fitting place for his final farewell.

* {{Retcon}}: As discussed in AllForNothing, the Monitor is apparently not as singular as any and all previous episodes would have viewers believe, with no prior indication that this is the case.

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse makes an appearance, reprised by Ezra Miller. It's made that much more impactful for remaining a secret up until the episode's broadcast.[[note]]And unlike Tom Ellis, he managed to completely avoid being spotted at the filming location.[[/note]]
* VFormationTeamShot: The Paragons stand together in this formation just as they confront the Anti-Monitor in his own universe.
* YearInsideHourOutside: Barry spends what seems to him like two seconds trying to enter the Speed Force, but to the others he is gone for three months.

* EnemyMine: Finally played straight when Luthor helps Ryan Choi an improvised time machine, and later when he joins the other Paragons in fighting the Shadow Demons. However, it's no secret that he's doing it only for himself.

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse makes an appearance, reprised by Ezra Miller. It's made that much more impactful for remaining a secret up until the episode's broadcast.[[note]]And unlike Tom Ellis, he managed to completely avoid being spotted at the filming location.[[/note]]

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse makes an appearance, reprised by Ezra Miller. It's made that much more impactful for remaining a secret up until the episode's broadcast.

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse makes an appearance, reprised by Ezra Miller. It's made that much more impactful for not being revealed prior to the episode's broadcast, either officially or through leaks.

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse, reprised by Ezra Miller. It's made that much more impactful for not being revealed prior to the episode's broadcast, either officially or through leaks.

* LeaningOnTheFourthWall: This is technically still an ''Arrow'' episode. The show where Oliver comes from is obviously fitting for where he says his final goodbye.

* WhamShot: Barry Allen from the Franchise/DCExtendedUniverse in the Arrowverse and trapped in the Speedforce.

* EleventhHourSuperpower: Oliver's stint as the Spectre that also happens to be his swansong.

!!Tropes Used in this episode:

* HeroicSacrifice: Oliver-as-Spectre grapples with the Anti-Monitor and, in a final show of force, obliterates him, but sacrificing his soul to do so.

* TimeToUnlockMoreTruePotential: To help the Paragons escape Vanishing Point, Oliver-as-Spectre unlocks Barry's full potential with the Speed Force.