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 Case	List of Episodes	The Final Screening Murder Case ›

Gadgets introduced

Cast

Characters

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.

Agasa and Ai realize that something has happened to Conan. 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, Ai 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. Ai and Ayumi investigate the abandoned tower of the castle and find the culprit using a secret entrance connected to the castle.

Attempted Murder