History Recap / QuantumLeap2022S1E18JudgmentDay

* RiddleForTheAges: We are not told whom Ben leaped into in 2051.

* TerminatorTwosome: The government in the future blames Project Quantum Leap for causing the BadFuture, so Martinez comes up with the idea to use the accelerator to go back in time and stop the Project. Problem is, the future Project team keeps undoing this, so Martinez turns it into a one-way mission to not only kill the Project team in the past, but destroy the accelerator as well. In order to stop this, Future Ian leaped into Dottie to warn Ben, setting off the events of the season. It's even {{lampshade|Hanging}}d; Past Addison chides Ben for recounting the plot of ''Film/TheTerminator'', and Ben later grimly muses that Martinez practically ''is'' a Terminator.

* ForWantOfANail: If not for Ben unknowingly standing right in front of a security camera as he wrote out Future Ian's code, Past Ian would never know about it, and the conclusion to the episode would have taken a much different path.

* SpottingTheThread: Past Addison realizes Past Magic was replaced when she sees the cigars he was supposed to give to Al.

* EnemyDetectingRadar: Just like before, the 2022 Project gets a notification that Martinez has leaped in. However, they don't know who he's leaped into until it's too late -- he has leaped into ''Past Magic'', and is trapped in the locked-down 2018 Project with everyone else.

* SanDimasTime: Played with at the end, and it's a doozy. Because Present Ben is synced 1:1 with the Project in 2022 (per the norm so they can use the Imaging Chamber and monitor his vitals), Past Ian is therefore 1:1 in sync with Present Ian. Both of them are, in turn, 1:1 in sync with Ben leapfrogging through his and Martinez's past leaps after Ben and Martinez use the 2018 accelerator. Both Ians have to enter the code at the exact same moment during this sync to hit the ResetButton.

Next: 2x01]

* CurbStompCushion: Martinez is the superior fighter to Ben (and even to ordinary Navy soldiers) and is able to beat up Ben for the most part. But as they battle across leaps, Ben recalls some boxing instructions from his coach in a previous leap and manages to get in more hits against Martinez, stagger him multiple times, and even beat him down some before Martinez eventually overwhelms Ben during their final leap into the Wild West and has Ben at gunpoint.

* TerminatorTwosome: The government in the future blames Project Quantum Leap for causing the BadFuture, so Martinez comes up with the idea to use the accelerator to go back in time and stop the Project. Problem is, the future Project team keeps undoing this, so Martinez turns it into a one-way mission to not only kill the Project team in the past, but destroy the accelerator as well. In order to stop this, Future Ian leaped into Dottie to warn Ben, setting off the events of the season. It's even {{lampshaded}}; Past Addison chides Ben for recounting the plot of ''Film/TheTerminator'', and Ben later grimly muses that Martinez practically ''is'' a Terminator.

* YouWouldntShootMe: Done with a twist as Ben says this to his hologram Addison when Past Addison is pointing a gun at him. A second later, Past Addison ''does'' shoot, but misses, and -- as she later confirms -- Ben reasons that she would not have missed unintentionally.

Ben leaps into the future, where he finds the scorched remains of Project Quantum Leap, and snow falling from the roof. He meets a future version of Ian, who gives him some advanced calculations and codes, as well as a warning...

'''Magic:''' ''[chuckling]'' No. They are without a doubt our weakness. I risked everything to bring Sam home, but there's nothing wrong with having a weakness for people. [[YouAreBetterThanYouThinkYouAre I think that's what makes you the kind of leaper the quantum accelerator can depend on.]]

* KillEmAll: During Martinez's MotiveRant, he reveals that he intends to wipe the entire Project out in one fell swoop.
-->'''Martinez:''' I had Ziggy run the probabilities. Every scenario in which Addison dies, one of you -- Magic, Ian, Jenn, you -- one of you always manages to keep the program alive. My mission was to neutralize the threat that time travel poses to the future of humanity. According to Ziggy, ''all'' of you have to die.

* BecauseDestinySaysSo: Played with. Ben is so assured that he and Addison are meant to be, that he breaks TheMasquerade to Past Addison. Problem is, ''they aren't in love yet,'' and Past Addison doesn't have the same relationship of trust that Present!Addison does. Still, Past Addison doesn't outright shoot him when given the opportunity, and later expresses remorse for not believing him. They still end up together when the ResetButton is pressed, though.

* CloseEnoughTimeline: After the ResetButton is pressed at the end, the last thing Ben has to do is make sure his first date with Addison is back on track. With Present!Addison's blessing, though, Ben does something he didn't do in the original history: he plants a BigDamnKiss on Past Addison.

* LaserGuidedAmnesia: Due to the Swiss-cheesed memory effect, Ben is only able to remember things that he learns (or regains memories of) during his leaps. This helps him when he uses his PhotographicMemory to memorize Future Ian's code, but not so much when the 2018!team quizzes him on their {{Trust Password}}s.

* QuantumMechanicsCanDoAnything: Past Ian and Present!Ian are able to sync up and use the reset code because they have "experienced a shared state."

* SanDimasTime: Played with at the end, and it's a doozy. Because Present!Ben is synced 1:1 with the Project in 2022 (per the norm so they can use the Imaging Chamber and monitor his vitals), Past Ian is therefore 1:1 in sync with Present!Ian. Both of them are, in turn, 1:1 in sync with Ben leapfrogging through his and Martinez's past leaps after Ben and Martinez use the 2018 accelerator. Both Ians have to enter the code at the exact same moment during this sync to hit the ResetButton.

* BecauseDestinySaysSo: Played with. Ben is so assured that he and Addison are meant to be, that he breaks TheMasquerade to Past!Addison. Problem is, ''they aren't in love yet,'' and Past!Addison doesn't have the same relationship of trust that Present!Addison does. Still, Past!Addison doesn't outright shoot him when given the opportunity, and later expresses remorse for not believing him. They still end up together when the ResetButton is pressed, though.

* BigDamnKiss: As soon as the ResetButton is hit, and Ben winds up back at the start of the 2018 leap, he finds himself with just enough time to scoop Past!Addison up into one ''hell'' of a kiss, much to the delight of everyone in the room.

* CloseEnoughTimeline: After the ResetButton is pressed at the end, the last thing Ben has to do is make sure his first date with Addison is back on track. With Present!Addison's blessing, though, Ben does something he didn't do in the original history: he plants a BigDamnKiss on Past!Addison.
* ContinuityNod: Past!Addison mentions "Al's place." She's referring to Al Calavicci's house, but it's also the name of the bar in another ''Series/QuantumLeap'' finale, "[[Recap/QuantumLeapS5E22MirrorImage Mirror Image]]."
* EnemyDetectingRadar: Just like before, the 2022 Project gets a notification that Martinez has leaped in. However, they don't know who he's leaped into until it's too late -- he has leaped into ''Past!Magic'', and is trapped in the locked-down 2018 Project with everyone else.

* ForWantOfANail: If not for Ben unknowingly standing right in front of a security camera as he wrote out Future!Ian's code, Past!Ian would never know about it, and the conclusion to the episode would have taken a much different path.
* TheGhost: Al Calavicci is still alive in 2018, and Past!Magic talks about going to visit him and take him some cigars, but Al is never seen.

** It doesn't take Ben long into his date with Past!Addison to decide to [[BrokenMasquerade break character]] and reveal he's from the future and has to protect her.

* IHatePastMe: Ian is not particularly happy about the leap involving Past!Ian, claiming that they were in a darker place at the time.
* IndyPloy: Ben's way of keeping Addison safe isn't to stick to their original history, but rather to break TheMasquerade, tell her that he's from the future and trying to protect her, and send her home so he can get back to the Project and draw Martinez out. Since Past!Addison hasn't fallen in love with him yet, she doesn't believe him, and confronts him when he returns to the Project.

* LaserGuidedAmnesia: Due to the Swiss-cheesed memory effect, Ben is only able to remember things that he learns (or regains memories of) during his leaps. This helps him when he uses his PhotographicMemory to memorize Future!Ian's code, but not so much when the 2018!team quizzes him on their {{Trust Password}}s.

* OurTimeTravelIsDifferent: The accelerator can ''not'' handle Ben being in the future, and makes repeated attempts to snap him back in time to his next leap. Future!Ian has to tell Ben to fight it as much as possible so they can give him the code to memorize.
* QuantumMechanicsCanDoAnything: Past!Ian and Present!Ian are able to sync up and use the reset code because they have "experienced a shared state."
* ResetButton: The code that Future!Ian wrote acts as this once fully implemented, sending Ben back to the beginning of his 2018 leap -- though with Martinez dead, the danger to Addison is over.

** Future!Ian remembers the original timeline where Addison leaped, which was undone by Ben stepping into the accelerator at the start of the series.

* SanDimasTime: Played with at the end, and it's a doozy. Because Present!Ben is synced 1:1 with the Project in 2022 (per the norm so they can use the Imaging Chamber and monitor his vitals), Past!Ian is therefore 1:1 in sync with Present!Ian. Both of them are, in turn, 1:1 in sync with Ben leapfrogging through his and Martinez's past leaps after Ben and Martinez use the 2018 accelerator. Both Ians have to enter the code at the exact same moment during this sync to hit the ResetButton.
* TheScapegoat: According to Future!Ian, Project Quantum Leap became the government's scapegoat for everything going wrong in the world, leading to Martinez's mission and the accelerator's destruction.
* SetRightWhatOnceWentWrong: Quoted by Martinez to Past!Addison, after he sets the accelerator to implode.
-->'''Past!Addison:''' What are you doing with our accelerator?\\

** Past!Ian mentions that they have been playing ''VideoGame/DarkSouls1''.
** Past!Addison, first thinking that Ben is joking about having traveled from the future to protect her from Martinez, references ''Film/TheTerminator''. When Martinez proves to be TheDeterminator, Ben muses that the comparison was apt.
* SoleSurvivor: Future!Ian says that they're the only person from the Project who survived the nuclear catastrophe.
* SpottingTheThread: Past!Addison realizes Past!Magic was replaced when she sees the cigars he was supposed to give to Al.

* TerminatorTwosome: The government in the future blames Project Quantum Leap for causing the BadFuture, so Martinez comes up with the idea to use the accelerator to go back in time and stop the Project. Problem is, the future Project team keeps undoing this, so Martinez turns it into a one-way mission to not only kill the Project team in the past, but destroy the accelerator as well. In order to stop this, Future!Ian leaped into Dottie to warn Ben, setting off the events of the season. It's even {{lampshaded}}; Past!Addison chides Ben for recounting the plot of ''Film/TheTerminator'', and Ben later grimly muses that Martinez practically ''is'' a Terminator.

** The 2018 team attempts to invoke this with Ben-as-Past!Ben, but his Swiss-cheesed memory can't recall any of the details they ask him for. Martinez-as-Past!Magic doesn't have this problem.

* YouWouldntShootMe: Done with a twist as Ben says this to his hologram Addison when Past!Addison is pointing a gun at him. A second later, Past!Addison ''does'' shoot, but misses, and -- as she later confirms -- Ben reasons that she would not have missed unintentionally.

* FormulaBreakingEpisode: This is the first ''Quantum Leap'' story to show a leap into the future (to 2051), a leap into a past version of the Project (in 2018), and a leapee who has been leaped into a second time by a different leaper (Magic, who was [[Recap/QuantumLeapS3E02TheLeapHomePart2Vietnam leaped into by Sam in 1970]] and Martinez in 2018, although the latter leap is undone).

** It doesn't take Ben long into his date with Young!Addison to decide to [[BrokenMasquerade break character]] and reveal he's from the future and has to protect her.

* IndyPloy: Ben's way of keeping Addison safe isn't to stick to their original history, but rather to break TheMasquerade and tell her that he's from the future and trying to protect her. Since this is Past!Addison who hasn't fallen in love with him yet, she doesn't believe him.

** Future!Ian remembers the original timeline where Addison leaped, which was undone by Ben stepping into the accelerator.

Ben leaps into his past self on the evening of Addison's first date. He's there to stop Martinez from killing her in the past.

* TheMissingno: Despite managing to leap to 1879 without issue, Ben leaping into 2051 causes him to repeatedly flash with blue energy as the accelerator tries yanking back into the past.

** When Ben and Martinez end up back on the ''Montana'', Ben-as-Rossi uses the chain of command -- which he learned about in "[[Recap/QuantumLeap2022S1E14SOS S.O.S.]]" -- and orders the naval personnel to apprehend Martinez-as-Walker. Martinez defeats them all with little issue.

* ChekhovsGunman: Almost literally with [[Recap/QuantumLeap2022S1E5SalvationOrBust Frankie]], who shows up again to shoot Martinez and save "Diego's" life.