I now have two enthusiastic actors on the project. One girl who is nervous, but acts well after a third take, and one guy I've known for some years... who I hadn't realized until on set, is much taller than the set itself!
They loved the bridge set. It really helped with our practice session. And apparently Brie likes the spinny chairs.
Also, both had never seen the original Alien movies. So as our "study session" before the practice, we watched the '79 movie (DC). They really liked it. They really look forward to doing more work on this project.