The Old Blue Castle Investigation Case
|Title:||The Old Blue Castle Investigation Case|
|Japanese Title:|| 青の古城探索事件 |
(Ao no Kojō Tansaku Jiken)
|Original airdate:|| February 22, 1999 (Part 1) |
March 1, 1999 (Part 2)
February 13, 2010 (Part 1, Remastered version)
February 20, 2010 (Part 2, Remastered version)
|Manga source:|| Volume 20: File 10 (200) ~|
Volume 21: File 3 (201-203)
|Cast:|| Conan Edogawa |
|Suspects:||Katsuo Tabata, Mitsuru Mamiya, Takahito Mamiya, and Masuyo Mamiya|
|Case solved by:|| Ai Haibara|
|Next Conan's Hint:|| Passport size (Part 1)|
Above the movie theater (Part 2)
|Director:|| Yasuichiro Yamamoto|
|Technical Director:|| 136 Yoshio Suzuki|
137 Hirohito Ochi
|Animation Director:|| 136 Miwa Oshima|
137 Atsushi Aono
|Opening song:||TRUTH ~A Great Detective of Love~|
|Closing song:||Still for your love|
|Prev episode:||« The Disappearing Weapon Search Case|
|Next episode:||The Final Screening Murder Case »|
|List of episodes|
 Gadgets introduced
 Part 1
The Detective Boys are on a camping trip but Professor Agasa forgot the tent. They then wander to a castle owned by an old mistress and learn that there's a secret treasure in the castle. Mitsuru Mamiya is actually the second husband of the eldest Mamiya daughter.
The Detective Boys, Haibara, and Agasa begin searching for Conan but have no luck. Pausing their search, the group eats dinner and discusses the chess pieces in the garden and the mystery treasure in the castle. During dinner, Mitsuru tells the group about the burnt tower and about a supposed curse that has resulted in the tower being locked.
|Burned Tower - Accident (Past)|
|Unusual Death (Past)|
After dinner, Agasa and Haibara realize that something must have happened to Conan to prevent him from contacting anyone. Agasa is about to phone the police to investigate but upon seeing Conan's hat in the hallway, he is lured to an opening in the wall.
 Part 2
When nighttime comes, Haibara investigates freely and is accompanied by the Detective Boys. They enter the same secret passage as Conan did and wander out of another secret entrance. Genta remains trapped in the passage and captured by the culprit.
Mitsuhiko investigates the doorway to the castle's tower and disappears. Haibara and Ayumi investigate the abandoned tower of the castle and find the culprit using a secret entrance connected to the castle.
 Remastered version
A remastered version of both episodes aired on February 13th and 20th, 2010.