The first point I want to make is that as usual, it is unfalsifiable or to use your word un debunkable.
Second point, the time line appears to be confused but this may be ineptitude of the producers and not the content per see.
The documentary presented, to me, has little value beyond entertainment.
Importantly it is worth noting that the box office hit "Houdini (1953)" and other paranormal films were all the rage at the time and to be frank ...still are...
Also it is worth noting that culturally the world in the late 50's was in the grip of alien UFO sightings, abductions, crop circles and other so called phenomena all possibly associated with heightened paranoia associated with the Cold war and the potential of nuclear holocaust by way of ICMB's . Tensions were high.(**) Which leads me to my next point.
While science has little trouble measuring many attributes or properties like pressure, compression, attraction, repulsion etc it has a lot more difficulty measuring tension, especially what would appear to be atmospheric or spacial tension. I believe in most cases it has to be calculated and not measured directly.
Tension is something animals including humans "feel" and react accordingly.