"Anytime you work on a show this good it's a very collaborative process. The ideas begin with the very talented writers, obviously, but once the actors give voice to the words the influence starts to go both ways. On a show that was less well-written, less character-based with less actual acting in it, changing the cast would make much less of a difference. But it's going to take at least three people to replace Billy West and if they get anybody else to do Bender -- it's just going to be a different character."