This one isn't mandatory, but it's pretty interesting. Click here to listen to the taped rehearsals. There's nothing incriminating here, but it's still revealing -- Niobe hates the entire process, Xenia is a really annoying director, Thanos is a sullen lump, and Grigor is a skittering, tap-dancing loony with a tendency to fall into Shatner impressions. It's going to be a heck of a weird play.
The first time you open this program, there's only one rehearsal, and it's a fairly tame one in which the actors mostly stick to the script. Over the course of the game, more will show up, and they get more and more out of control as time goes on. Check back once in a while for more revealing recordings.