Behind the scenes
Brook is a more prominent character in the novelisation. He is in the chapters that adapt both episode one and episode six, whereas he is mentioned in episode one, but only appears in episode six of the televised story. There, he is seen abruptly and without any introduction because the role of the newscaster was cut. In the book, he's the Leader of the Opposition and a figure whom many of the public adore. None of this really comes across in the televised episode, where his brief appearance makes him seem like an extremist rather than a potential president-in-waiting.