In Act Zero was a single episode of Pretty Guardian Moon, which told how Minako Aino and Artemis first became a team, and about their first mission to protect Usagi Tsukino from a group of eccentric jewel thieves.
Unfortunately the movie Pretty Guardian Sailor Moon: Act Zero is not yet available on HBO Max.
| Writing | Yasuko Kobayashi | Screenplay |
| Crew | Naoko Takeuchi | Creator |
| Directing | Ryuta Tasaki | Director |