Gregory Horror Show: The Bloody Karte
Japanese title: グレゴリーホラーショー - The Bloody Karte
Type: Special
Source: Original
Episodes: 12
Status: Finished Airing
Aired: Apr 7, 2001 to Jun 30, 2001
Duration: 3 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Milky Cartoon
Producers: VAP, TV Asahi
Licensors: Geneon Entertainment USA
Genres: Comedy, Horror, Mystery, Supernatural
Themes: Mythology

The fourth series, The Bloody Karte (presented as a side series on the DVDs) is a set of 12 stories about Catherine working in a mysterious hospital.  

(Source: AniDB)