Phi Brain: Kami no Puzzle - Shukuteki! Rätsel-hen
English title: Phi Brain: Puzzle of God 3
Japanese title: ファイ・ブレイン 〜神のパズル 宿敵！レイツェル編
Alternative titles: Phi Brain: Kami no Puzzle Dai 3, Phi Brain: Kami no Puzzle Third Season, Phi Brain: Kami no Puzzle 3rd Season, Phi Brain: Puzzle of God - Nemesis! Raetsel-hen
Type: TV
Source: Original
Episodes: 25
Status: Finished Airing
Aired: Oct 6, 2013 to Mar 23, 2014
Broadcast: Sundays at 17:30 (JST)
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Sunrise
Producers: NHK
Licensors: Sentai Filmworks
Genres: Action, Mystery, Suspense
Themes: High Stakes Game, Strategy Game

"Are puzzles really necessary in this world?"

In order to restore Jin's memory, Kaito and his friends go on a puzzle-viewing journey to England. As they're walking through the underground maze beneath the church, where young Kaito and Rook first met Jin, a mysterious girl appears in front of them.

Jin calls the girl by the name "Raetsel". It seems they know each other. However, she suddenly disappears and takes Jin with her. What's more, the traps in the underground maze are activated and start coming after Kaito and his friends.

(Source: www9.nhk.or.jp)