So Carney gets you all pumped up about how together you two shall defeat the Time Traval Nazis, and then you'll go back in time to save the Jews from the concentration camps. Your all for that.
But what Carney really needs is someone to distract them at the dimensional gates so he can slip into they're rhealm to steal a space ship and escape out of there. So here you are are climbing up to the third story window like he told you. you pry the window open using thieves tools and your in. But There's a Nazi in there brushing his teeth with crystal meth. He fires three times, missing every shot. you bolt for the door but the next shot kills you.