sharpshooters fellow spacewalkers to keep the base in ship shape from the outside. more flight engineers and people in satellite communications. conservationists to ensure what happened to earth doesn't reprise itself on terra. alien conspiracy theorists a la dale gribble. exes and current flirtations. more instructors and cadets. especially some fresh-faced newbies. the stodgy uniform shop guy. a fleshed-out r&d department to come up with cool new space toys. entry-level techies and customer service reps who have to keep the internet working even when there's an alien attack going on.