We're going to hit the ground running, actually, meaning that our characters won't be living their cushy lives at the university very long.

After Klaus and Ros meet at the diner, an SS officer is going to come visit the Zauber team and question them on military applications of their research. Klaus is going to be pretty uncooperative. The raid will be very soon after that, as in the next day or next couple of days. 

Klaus and Ros, at least, are going to defect and go into hiding. 

It would actually be pretty interesting if Aaron was unsure about defecting initially and remained working for the Nazis at Humboldt.