Note this applies to item with ASIN B00005Y6YP only.
This was a big disappointment. There is nothing wrong with the quality of the sound or vision, it's just that all the episodes have been edited together to form what is essentially a movie. Gone are the cliffhanger endings to each episode, and gone are the opening titles, theme music and end credits listing cast and crew. Why? Even the episodes themselves have been edited with sections removed from them.
An example of this is the very first few scenes when the purpose and plot behind the 'Nitron' lamp and the demise of the two martians is lost by the removal of a scene with Emperor Ming and Azura. Also, you may be left wondering when Flash finds Happy Hapgood stowed away on Dr. Zarkhov's rocket ship why he's says 'oh, its you again!'. That's because the scenes introducing the character who makes a nuisance of himself to Flash and Zarkhov earlier have been removed resulting in loss of continuity. Zarkhov's discovery of the cause of the earth's atmospheric disturbances is also missing.
Why not release the feature on two discs if there was not enough room for the full running length of all episodes? If you're not interested in the theme tune, cast, crew, full story and the good old cliffhanger endings then this is the disc for you, otherwise you're not getting the story as it was originally intended.