Based on Akagawa Jirou's popular book series about hapless detective Katayama Yoshitaro who lives with his sister Harumi and their cat Holmes, which has a sixth sense when it comes to solve mysteries. In this stand alone OVA the aftershow party of Harumi's acting troupe becomes the showplace of murder and tragedy. Luckily Yoshitaro brought Holmes along.
Unfortunately the movie Calico Cat Holmes and the Lord of the Haunted Castle is not yet available on HBO Max.
| Directing | Nobuyuki Kitajima | Director |
| Writing | Emu Arii | Writer |
| Directing | Takeshi Aoki | Assistant Director |
| Sound | Kentaro Haneda | Music |
| Crew | Jirô Akagawa | Creator |
| Visual Effects | Nobuyuki Kitajima | Character Designer |
| Art | Kenji Kamiyama | Art Direction |
| Visual Effects | Noboru Furuse | Animation Director |
| Visual Effects | Nobuyuki Kitajima | Animation Director |
| Sound | Fusanobu Fujiyama | Sound Director |
| Camera | Kazuhiro Konishi | Director of Photography |
| Visual Effects | Masahiro Tanaka | Key Animation |
| Visual Effects | Naoko Ozawa | Key Animation |
| Visual Effects | Keiji Gotoh | Key Animation |
| Visual Effects | Masazo Ota | Key Animation |
| Visual Effects | Masashi Yanagishita | Key Animation |
| Visual Effects | Koichi Nakaya | Key Animation |
| Visual Effects | Yoshiko Nakajima | Key Animation |
| Visual Effects | Masahiro Kase | Key Animation |
| Visual Effects | Fumihide Sai | Key Animation |
| Visual Effects | Osamu Tanabe | Key Animation |
| Visual Effects | Tomoaki Kado | Key Animation |
| Visual Effects | Jiro Kanai | Key Animation |
| Visual Effects | Tatsuya Tomaru | Key Animation |
