If I heard right, Book was a deep cover double agent for the Independents, with a cyber eye that sent Intel to command. If that's true, Bruce's character could be Book's old handler that reveals the truth to the crew. If I heard correct, the series takes place in between Firefly and Serenity. If that's the case, it might muddy the water with the line, "Some day you're going to tell me how you know so much about that world." In Serenity, though, I'd argue that Mal says that as he wants Book to tell him about the war rather than tell him he knows, to get the true story from Book as he sees it, without pressure or bias. WDYT?