Ep. 4: Satoru and Kayo visit the science center, but her absence the next day creates new uncertainty.
Aired on January 29, 2016

With Sachiko's assistance, Satoru successfully invites Kayo to the local science center. During their date, Satoru experiences a strong sense of déjà vu, fearing he is trapped in a repetitive loop. After March 1st, the date Kayo originally vanished, passes without incident, Satoru and Kayo celebrate their birthdays the following day. Satoru feels confident that he has altered the timeline. However, the subsequent day brings unexpected trouble when Kayo fails to appear at school, casting doubt on the success of his efforts.
Episodes
- Ep. 1 · Satoru Fujinuma travels back to 1988 after his mother's murder in 2006
- Ep. 2 · Satoru notices Kayo's bruise and invites her to his birthday party to prevent her death.
- Ep. 3 · Satoru confronts Kayo's abuse and reveals a Christmas tree to comfort her
- Ep. 4 · Satoru and Kayo visit the science center, but her absence the next day creates new uncertainty.
- Ep. 5 · Satoru flees police suspicion while investigating Kayo's disappearance with Airi's help.
- Ep. 6 · Satoru investigates Sachiko's death while being pursued by police and a mysterious suspect.
- Ep. 7 · Satoru uses Revival to save Kayo by orchestrating a staged abduction in an abandoned bus.
- Ep. 8 · Satoru investigates Kayo's home for clues linking the intruder to past murders