It truly was an enjoyable visual experience to view PM in color. But for the life of me I'll never understand why they chose to only produce this one color episode. The script was average but the visual effects were quite remarkable for 1966. I have to agree with other reviewers the depth of color scenes brought back memories of Batman and Star Trek.. which isn't a bad thing. I'd like to know the real reason there was no Season 10 but that may never be known. One item of interest.. this lone color episode offered the entire production crew an opportunity to appear on camera.