I suspect this was allowed to be broadcast in 1968 (the year I was born) with the bold assumption that even those who possessed the attention span to sit through this episode would find it completely absurd or just wouldn't get it. There is some deep truth-telling on the level of Fritz Springmeier's writings. Why haven't they buried this episode with the rest? Of course they have to put the truth out there, hidden in plain sight as they like to do or must. Are they taunting us now?
And Donald Pleasance is a creepy dude from way back. In addition to Blofeld, her was the well-meaning but blundering psychiatrist of Michael Myers in the first Halloween (1978?), a blueprint of the ubiquitous fear porn and serial killer psy-op I grew up watching along with my clueless teenaged sitters. I would suggest checking the writings of Miles Mathis, who has some interesting theories that almost everything is a psy-op and mostly fake, including nuclear weapons. Thanks for the suggestion, Howdie. That was deep.