What's really cool is that ALL of the footage was real- no substituted DC-7s or some wrong aircraft. Obviously they had SAC's cooperation- even to the point of footage shot through the refueling tech's picture window showing an actual docked probe with a B-47 going askew and almost snapping! I imagine the show's writers customized their story to available film. All of the cabin work (...the main setting for the story) was in a real 47. It's an impressive story accuracy wise- except perhaps the General who gets riled back at Group HQ and basically takes over the mic, barking orders to the 135 crew and to the 47 as long as they can receive. Every once in a while some production has personnel aboard that strive for accuracy in fact basis (another example- an episode of "U.F.O." that backed up a piece of space debris as a S-IVb from a particular Apollo flight that went into solar orbit, that was being "cleaned up" as an effort to rid the space ways of junk. It does end up being blown up by the bad guy aliens; an example of the opposite is just about anything on episodes of "JAG"....).