They Were 11 is an anime film that premiered in fall 1986, produced by Magic Bus.

About the production: the story comes from a manga, the film runs about 91 minutes and its current status is "finished".

Its main genres are action, adventure, drama, mystery, romance and sci-fi, with themes such as Survival, Space, Aliens and Ensemble Cast.

On AniList, They Were 11 has an average score of 67%, a good score, and appears on 5,185 users' lists.

In the distant future, ten space cadets embark on a survival test that sets them adrift in a derelict spacecraft from which they must find their way home. Terror strikes when the cadets discover eleven of themselves aboard the ship. Who is the imposter, and what is his (or her) purpose? Paranoia runs rampant and lives hang in the balance as the cadets scrutinize one another for any wrong move. Can they identify the spy before it’s too late? (Source: Central Park Media)

Official synopsis from AniList.