A science fiction movie, made for tv I think.
A classic ripoff of countless other stories, it’s about a group of young people (20s) in some sort of space navy assigned to some sort of mission. The senior officers in the ship die or disappear or whatever and so the young people have to take charge, confront challenges, whatever.
The one scene that sticks in my head is that one of the crew members betrays the crew somehow, so they have a court-martial for him or her. The young people all put on dress uniforms, and they have to “vote” by putting different colored balls into a cup. One of the other crew members, a lady, really hates the guy who’s on trial and she puts a black ball into the cup in such a way that everyone can see what color her ball is.