Eye In The Sky vs Drone (Robot) Wars
The drone doesn’t need an operator for control (it could be pre-programmed) but it does need one for battery charging. So we need an Eye in the Sky military drone to video the entire airfield and surrounding area, and when it appears you rewind the recording to find it’s origin.
Or when it appears we send up a fleet of drones for aerial combat. Drones could be deployed to different areas in readiness, or they could maintain continuous monitoring at close quarters, and follow the thing home.