Charles devises a method of fitting a Lewis gun to their plane, and Alan makes it a reality, but in their first aerial combat they find the design still needs work, when they shoot out some struts in their own plane.

On a reconnaissance mission with observer Conrad, Alan disregards Conrad's order to move closer to a German Eindecker, turns for home and avoids a confrontation. Conrad insists Alan be court-martialled for disobeying an order and cowardice.