Well, I have to agree that I agree with Peter-- I like Olivia as a redhead with bangs better than as a blonde with her hair pulled straight back all the time. The blonde style gives her a kind of a death's head look.
I also have to say I saw the "switch" of Olivias coming....although not sure how "Altivia" managed to use the grenade that knocked everyone out and allowed the switch. I thought Olivia had those. Maybe I blinked.
If that was Nimoy's last ever acting scene you have to say he went out with a bang!