if there’s one thing i love about Joss Whedon, it’s this:
he tends to reuse actors in several things, here and there.
such as - we saw Nathan Fillion in Firefly, Dr. Horrible’s, it all started with Buffy. Alan Tudyk was recently in Dollhouse but started with Firefly. Adam, he started with Firefly as well, but later made a 5 episode appearance in Angel.