Lt. Rosenthal joins the 100th just as one of its crews reaches a milestone. The U-boat pens at Bremen become a target for the second time.

Rosie's next mission signals a significant shift in the 100th's bombing strategy. Crosby receives a promotion, but it comes with a high price.

The prisoners of Stalag Luft III attempt to connect with the outside world. Berlin becomes the 100th's primary target. Rosie makes a crucial decision.