In all scenes in the B-52 cockpit the background sound is the drone of a heavy propeller driven aircraft. The B-52 aircraft has 8 turbojet engines which have an entirely different sound.
Although location is in Maryland, California license plates can be seen
on most of the parked cars not involved in the action.
This is Alfred Ryder's second appearance as an Invader "Leader." Although he is never given a name, Vincent calls him "Ryder" in this episode.