Ep. 23: Rintaro seeks help to escape while Mayuri and Suzuha face time paradoxes.
Aired on September 27, 2018

In a world line where Amadeus is absent, Rintaro reaches the roof with Moeka’s assistance to bypass Leskinen. He urges Mayuri and Suzuha to travel to the past, while Kagari supports him in delaying enemies until the time machine departs before a helicopter strike. Mayuri returns just as Rintaro fails his rescue, contacting her past self to guide him. To avoid a paradox, she and Suzuha jump into an unknown era. Past Mayuri slaps Rintaro to restore his focus and receives a D-mail. In 2025, Rintaro sends his younger self a video on saving Mayuri and Kurisu before departing to find the others. Meanwhile, Mayuri and Suzuha are stranded in a barren land in 18,000 BC when Rintaro arrives to rescue them.
Episodes
- Ep. 19 · Okabe relies on friends and hope to stop war and disaster in the Time-leap Machine arc
- Ep. 20 · Rintaro wakes in 2036 Akihabara to learn of Daru's time leap and Mayuri's missed rescue window.
- Ep. 21 · Image Formation Renaissance: The Phoenix Returns to the Past
- Ep. 22 · Rintaro uses D-RINE to delete Amadeus Kurisu data and stop Russian interference with the time machine.
- Ep. 23 · Rintaro seeks help to escape while Mayuri and Suzuha face time paradoxes.
- Ep. 24 · Crystal Polymorphism Valentine's -A Bittersweet Intermedio-