The Old Blue Castle Investigation Case

	Attempted Murder
Location:	Secret passage
Victim:	Conan Edogawa
Suspects:	Unknown
	Conan finds a clue to the treasure and enters a secret passage but is attacked by an unknown assailant.

Wristwatch Flashlight
	Agasa added the flashlight function to Conan's watch;

	Episode 136-137 ; (Int. Episode {{{int-episode}}})
	Information
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)
Season:	6
Manga source:	Volume 20: File 10 (200) ~; Volume 21: File 3 (201-203)
	Case
Cast:	Conan Edogawa ; Ai Haibara ; Detective Boys; Professor Agasa
Case solved by:	Ai Haibara; Conan Edogawa; Professor Agasa
Next Conan's Hint:	Passport size (Part 1); Above the movie theater (Part 2)
	Staff
Director:	Yasuichiro Yamamoto; Kenji Kodama
Organizer:	Hirohito Ochi
Storyboard:	Hirohito Ochi
Episode director:	136 Yoshio Suzuki; 137 Hirohito Ochi
Animation director:	136 Miwa Oshima; 137 Atsushi Aono
Voice Cast:
	Minami Takayama as Conan Edogawa; Kenichi Ogata as Professor Agasa; Chafurin as Inspector Megure; Megumi Hayashibara as Ai Haibara; Yukiko Iwai as Ayumi Yoshida; Ikue Otani as Mitsuhiko Tsuburaya; Wataru Takagi as Genta Kojima, Next Conan's Hint; Hisako Kyouda as Masuyo Mamiya; Yoshisada Sakaguchi as Mitsuru Mamiya; Jin Yamanoi as Takahito Mamiya; Naoki Tatsuta as Katsuo Tabata; Isshin Chiba as Servant; Nao Takamori as Housekeeper
	Music
Opening song:	TRUTH ~A Great Detective of Love~
Closing song:	Still for your love

Chronology
‹ The Disappearing Weapon Search Case	List of Episodes	The Final Screening Murder Case ›

Gadgets introduced

Cast

Characters

Gadgets

Power-Enhancing Kick Shoes

Criminal Tracking Glasses

Case

Situation

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.

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.

Unusual Death (Past)

Location:	Forest
Victim:	Mitsuru Mamiya's assistant
Cause of death:	Starvation
Suspects:	Unknown
Mitsuru Mamiya's assistant explored the burnt tower two years ago, but never returned. Ten days later, the assistant was found starved to death in the nearby forest. The police ruled the assistant's death as accidental from becoming lost in the forest. After this discovery, maids working at the castle spread the rumor that the assistant died of a curse by the mistress and the others who perished in the fire.

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.

Attempted Murder

Location:	Secret passage
Victim:	Professor Agasa
Suspects:	Unknown
Peeking in the opening to a secret passage while looking for Conan, Agasa is attacked by the same culprit who attacked Conan.

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.

Kidnapping

Location:	Secret passage
Victim:	Genta Kojima
Suspects:	Unknown
Genta is kidnapped while in the secret passage.

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.

Attempted Murder