Lingering questions about Rise of the Planet of the Apes

First off, I was delighted by the array of geeky guest stars in Rise of the Planet of the Apes. Draco Malfoy and Rodney McKay both have smallish but pivotal roles.

Fun fact: John Lithgow's distress always genuinely upsets me--including, but not limited to, Harry and the Hendersons and the time he was lost in 30 Rock--so watching him play an Alzheimer's patient was hard.

( spoilers ahead )