Plenty of Observer teleportation tonight, so guess we answered that question.
Loved Walter's complete non-reaction to the taser. "You electrocuted me!"
It was good to have Broyle's back (bad makeup aside), and unfortunately, I correctly figured either he or Etta were not going to survive the episode. Sad to see it was the latter, as I liked the actress and thought she was a good addition to the crew, but it does seem to lend credence to what I've been thinking the ultimate end game will be. Basically, they defeat the observers, obtain their tech, go back in time, and completely erase this whole timeline.