Episode 155

| Chronology | | |
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| ‹  [Sonoko's Dangerous Summer Story](/wiki/Sonoko%27s_Dangerous_Summer_Story "Sonoko's Dangerous Summer Story") | [**List of Episodes**](/wiki/Anime#Episodes "Anime") | [Metropolitan Police Detective Love Story 2](/wiki/Metropolitan_Police_Detective_Love_Story_2 "Metropolitan Police Detective Love Story 2")  › |
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| --- | --- |
| **Episode 155   (Int. Episode 165)** | |
|  | |
| **Information** | |
| Title: | Underwater Key in the Locked Room Case |
| Japanese title: | 水中の鍵密室事件   (Suichū no Kagi Misshitsu Jiken) |
| Original airdate: | August 2, 1999 |
| Broadcast rating: | 16.4% |
| Filler case: | #57 |
| Season: | (/wiki/Season_4 "Season 4") |
| Manga source: | **TV Original** |
| **Case** | |
| Cast: | [Conan Edogawa](/wiki/Conan_Edogawa "Conan Edogawa")   [Ran Mouri](/wiki/Ran_Mouri "Ran Mouri")   [Kogoro Mouri](/wiki/Kogoro_Mouri "Kogoro Mouri")   [Juzo Megure](/wiki/Juzo_Megure "Juzo Megure")   [Wataru Takagi](/wiki/Wataru_Takagi "Wataru Takagi")   [Detective Yokoyama](/wiki/Detective_Yokoyama "Detective Yokoyama") |
| Case solved by: | [Conan Edogawa](/wiki/Conan_Edogawa "Conan Edogawa") |
| Next Conan's Hint: | Crayon |
| **Staff** | |
| Director: | [Yasuichiro Yamamoto](/wiki/Yasuichiro_Yamamoto "Yasuichiro Yamamoto")   [Kenji Kodama](/wiki/Kenji_Kodama "Kenji Kodama") (chief) |
| Screenplay: | [Kazunari Kouchi](/wiki/Kazunari_Kouchi "Kazunari Kouchi") |
| Storyboard: | [Takashi Iwama](/wiki/Takashi_Iwama "Takashi Iwama") |
| Episode director: | [Koichi Sasaki](/wiki/Koichi_Sasaki "Koichi Sasaki") |
| Animation director: | [Masayuki Hiraoka](/wiki/Masayuki_Hiraoka "Masayuki Hiraoka") |
| Character design: | [Masatomo Sudo](/wiki/Masatomo_Sudo "Masatomo Sudo")   [Yasuhiro Moriki](/wiki/Yasuhiro_Moriki "Yasuhiro Moriki") (design works) |
| | Voice Cast: | | --- | | [Minami Takayama](/wiki/Minami_Takayama "Minami Takayama") as [Conan Edogawa](/wiki/Conan_Edogawa "Conan Edogawa")   [Wakana Yamazaki](/wiki/Wakana_Yamazaki "Wakana Yamazaki") as [Ran Mouri](/wiki/Ran_Mouri "Ran Mouri")   [Akira Kamiya](/wiki/Akira_Kamiya "Akira Kamiya") as [Kogoro Mouri](/wiki/Kogoro_Mouri "Kogoro Mouri")   [Chafurin](/wiki/Chafurin "Chafurin") as [Juzo Megure](/wiki/Juzo_Megure "Juzo Megure")   [Wataru Takagi](/wiki/Wataru_Takagi_(voice_actor) "Wataru Takagi (voice actor)") as [Wataru Takagi](/wiki/Wataru_Takagi "Wataru Takagi"), Next Conan's Hint   [Takayuki Inoue](/wiki/index.php?title=Takayuki_Inoue&action=edit&redlink=1 "Takayuki Inoue (page does not exist)") as [Detective Yokoyama](/wiki/Detective_Yokoyama "Detective Yokoyama")   [Junko Hori](/wiki/index.php?title=Junko_Hori&action=edit&redlink=1 "Junko Hori (page does not exist)") as Mitsue Souda   [Susumu Chiba](/wiki/index.php?title=Susumu_Chiba&action=edit&redlink=1 "Susumu Chiba (page does not exist)") as Yoshihiko Kido | | |
| **Music** | |
| Opening song: | [Girigiri chop](/wiki/Girigiri_chop "Girigiri chop") |
| Closing song: | [Free Magic](/wiki/Free_Magic "Free Magic") |
***Underwater Key in the Locked Room Case*** (水中の鍵密室事件 ,*Suichū no Kagi Misshitsu Jiken*[?](/wiki/Help:Japanese "Help:Japanese")) is the 155th episode of *[Detective Conan](/wiki/Detective_Conan "Detective Conan")* [anime](/wiki/Anime "Anime").
## Contents
* [1 Cast](#Cast)
* [2 Case](#Case)
+ [2.1 Situation](#Situation)
+ [2.2 People](#People)
+ [2.3 Resolution](#Resolution)
* [3 BGM listing](#BGM_listing)
* [4 Gallery](#Gallery)
* [5 In other languages](#In_other_languages)
* [6 See also](#See_also)