- Written by : Kento ShimoyamaDirected by : Takayuki Shibasaki
- Woz: The fallen enemies of past Kamen Riders have been reborn, and unleashed.
Swartz is intent on destroying the world.
Only two pages remain... until the end of the world.
Decade has declared that he will destroy Sougo's world, as this world is on a verge of destruction already. But before he could act, a horde of monsters of Heisei Kamen Riders are overwhelming them. In the end, Decade takes them away with his dimension wall.
Sougo, Geiz, Tsukuyomi, Woz and Tsukasa Kadoya are then resting in 95 DO while discussing their next plan. Tsukasa explains that there are many worlds, with Kamen Riders in each of them. The worlds are supposed to be separated from each other, but the existence of Sougo is causing the worlds to become one in this world. Swartz's real goal is to combine all the worlds and then destroying the combined world to save his own world, there are still three options available to Sougo: either he defeats Swartz, causing both he and Tsukuyomi to vanish; or let Swartz destroy the world; or finally, for Sougo to become Oma Zi-O. Tsukasa goes on with his original plan to destroy this world, but he can't let innocent people die alongside the destruction. With those in mind, they discuss a plan to solve this conflict, with the world's fate as its stake.
As Geiz, Tsukuyomi and Woz are headed out for their early part of the plan, Sougo is gazing at the clocks lining the wall of his house in melancholy. Tsukasa asks if Sougo is ready for this plan, as he won't survive in the end. But, Sougo answers calmly that all of this time, he's always ready for this. In fact, he feels that he's ready for this even before he was born. With that declaration, he goes to find Junichiro who are out shopping.
Tsukuyomi is helping civilians from the monsters while Woz looks in disinterest as he's supposed to protect her instead. Woz transforms to Woz Ginga Finally to help her, until Chaser arrives to capture Tsukuyomi. The Roidmude transforms into Mashin Chaser, and they fight into a standstill.
In the other place, Geiz approaches Swartz's hiding place and manages to lure him out. They transform into Geiz Revive Goretsu and Another Decade respectively and begin their battle.
In the other place of the city, Junichiro is chased around by monsters until Zi-O arrives to help. Junichiro recognizes Sougo's voice inside the Zi-O suit, so Sougo undoes his transformation and declares himself as a Kamen Rider, that fights evil to protect people. Sougo says that he's on a mission and asks for Junichiro's permission as he's likely won't come back. Junichiro agrees and Sougo goes to the year 2068 in his Time Mazine.
Sougo arrives in 2068, in the front of the monument of his first transformation as Zi-O. Nearby, a battle of Oma Zi-O against the Resistance is happening with Oma Zi-O defeating them easily. Sougo then approaches a wounded Tsukuyomi and declares that he will fight Oma Zi-O alone, and the Resistance must back off. In the midst of her confusion, Sougo slips a Blank Ridewatch into her pocket. After that, Sougo transforms into Zi-O, surprising Tsukuyomi and a nearby Geiz. As Sougo confronts Oma Zi-O, his future self is intrigued because he doesn't have any memory of coming to 2068 at an earlier time. Sougo says that the past is already changing, and rushes the Demon King to attack.
Back in 2019, Geiz is struggling against Another Decade as he keep sending monsters after him. Decade then arrives to help, as their true purpose is to distract Swartz away from Tsukuyomi. Still, Another Decade is too strong, and he prepares his finisher to kill Geiz...
Back to Woz and Mashin Chaser's battle, Woz is knocked out from transformation as he tries to sway Chaser by telling his true history as a Kamen Rider. After struggling with pain of his memories, Chaser still doesn't accept his past, and shoots the untransformed Woz...
In 2068, Sougo is overwhelmed by Oma Zi-O. He tries to use the Trinity Ridewatch, saving Geiz and Woz from certain death to achieve Zi-O Trinity.
In 2019, Swartz's Dimension Kick misses Geiz and Decade rush him as he feels like that Decade vs Decade is more in his favor. While it's true that they are both Decade, Swartz has other abilities that is beyond Decade's, that is his time stopping power. But, Swartz is frozen in time instead as Daiki Kaito arrives. Decade and Diend then fight together against Swartz.
In 2068, the fused Rider manages to fight Oma Zi-O on the same level, even forcing the Demon King to his knees with Time Break Burst Explosion. Oma Zi-O is intrigued as why his past self is stronger than him, and Sougo answers that Oma Zi-O is always alone while he has friends that are helping him. The Demon King of Time accepts this answer, but then he asks if Sougo is really their friend, why he conceals that he will die to protect said friends? Before Geiz and Woz could react to this however, Sougo undoes his transformation, thus sending Geiz and Woz back to 2019.
Sougo continues his talk with Oma Zi-O. He says that Oma Zi-O never truly tried to hurt him as they're the same person, thus their battle is meaningless. Oma Zi-O agrees and drops his hostility. Sougo asks just what is Oma Zi-O's true power, and the Demon King answers that his power is to destroy worlds and timelines, unlike Swartz who can only destroy worlds. With that answer, Oma Zi-O sends Sougo back to 2019.
In the background, Tsukuyomi and Geiz are watching their battle intently, and they know that they can travel to the past to prevent the rise of Oma Zi-O. Meanwhile, Oma Zi-O began lending his power to Sougo that enters Tsukuyomi's Blank Ridewatch.
Back in 2019, Geiz is transported when Another Decade is repelling Decade and Diend's vicious attacks. Decade then provokes Swartz by revealing that the one who will be saving this world is Tsukuyomi, causing him to bolt in anger.
Tsukuyomi is still on the run from Mashin Chaser while Woz catches up to them. Woz once again tells Chaser about his true history, halting his assault for a moment... until Another Decade arrives. The Another Rider commands to leave Tsukuyomi to him, but Mashin Chaser betrays him instead, because he believes he is a Kamen Rider, though he is hit fatally by Another Decade. As Geiz arrive to cradle the dying Chase, the future Rider says that he will always have friends in them. With that, Chase dies.
Seeing this, Swartz has had enough and attacks Tsukuyomi. Suddenly Sougo arrives from the future to tell Tsukuyomi about her Blank Ridewatch. Tsukuyomi takes it out from her pocket, and said Ridewatch transforms into the Tsukuyomi Ridewatch. Woz tosses her a Ziku-Driver, and Tsukuyomi transforms into Kamen Rider Tsukuyomi for the first time, bringing the battle to its climax.
List of Episode Tropes
- 11th-Hour Ranger: Tsukuyomi transforms into her Rider form for the first time after receiving a blank Ridewatch from Sougo.
- Bash Brothers: Kaito backs up Tsukasa, after Swartz's combined time and Another Rider powers prove too much for Tsukasa.
- Betrayal Insurance: To give Tsukuyomi a fighting chance against Swartz, Sougo and Tsukasa devise a plan where Sougo travels to 2068 to give her a Blank Watch to store some portion of her powers, so that when the time comes where Swartz steals her powers he could not manage to take all of it, much like Tsukasa with his Decade powers. This, and further empowering from Oma Zi-O, allowed her to use her remaining powers to transform into Kamen Rider Tsukuyomi, to face Swartz as Another Decade.
- Can't Kill You, Still Need You: Sougo undoes his transformation mid-fight with Oma Zi-O, as he knows Oma was never serious about fighting him. Oma agrees; after all, they are the same person.
- Chekhov's Gag: With a mix of Foreshadowing. Tsukuyomi's supposed 'transformation' that originally appeared as a one-off gag from Supplementary Material turns out to be very important for Tsukuyomi.
- Didn't See That Coming:
- Sougo in Zi-O Trinity is able to get a solid hit on Oma Zi-O because that form didn't exist in Oma Zi-O's timeline thus he was caught completely by surprise.
- Swartz is caught completely off guard by Tsukuyomi becoming a Rider.
- Doom Magnet: Tsukasa reveals this was Swartz's plan with using Sougo. By giving him time-space manipulation powers and then introducing the Another Riders, Sougo subconsciously acts as an anchor that converges all the other Kamen Rider worlds into his world in order to obtain their powers, which in turn erases the Kamen Riders from existence. By the time he has obtained all of their powers, all of the Kamen Rider worlds have been fused into one, allowing Swartz to pull out their enemies from his Another Worlds to freely cause the mass destruction of the combined world that he wanted.
- Freak Out: Alternative Chase has one when he saves Tsukuyomi from a Roidmude and is told that he was a Kamen Rider in the canon timeline by Woz.
- Hero Killer: Swartz continues his streak as he kills Alternative Chase.
- Internal Reveal: Sougo reveals to Junichiro that he became a Rider, to which Junichiro comments that Sougo has become something like a king when Sougo describes to him that he has been using this power to protect people.
- Pet the Dog: Oma Zi-O helps Sougo by empowering the blank Ridewatch that Sougo slipped to Tsukuyomi despite thinking it was pointless.
- Planet Destroyer: Oma Zi-O reveals that he can destroy time and space, something that Swartz still cannot do as Another Decade.
- Stable Time Loop: Downplayed as this episode reveals that Tsukuyomi and Geiz were inspired to travel to the past when they met present!Sougo (who traveled to the future), but Oma Zi-O states he doesn't have memories of meeting Sougo at this point in time and was surprised by the Zi-O Trinity Ridewatch as something like that never existed in his timeline, showing that there have been changes.
- Take a Third Option: Sougo decides to follow Tsukasa's plan despite the intent to destroy his world as it's another option compared to the three Swartz gave him.
- Took a Level in Badass: Due to Sougo traveling to the future to give Tsukuyomi a blank Ridewatch and Oma Zi-O empowering it, Tsukuyomi becomes a Kamen Rider at the end of the episode.
- Why Can't I Hate You?: Chase has no idea why he can't bring himself to kill Tsukuyomi no matter how hard he tries.
