https://www.groundzeromedia.org/show/6-17-24-dream-theater-w-dr-john-hall
Dreams and the power of subconscious suggestions have been around for quite a while.
https://en.wikipedia.org/wiki/MKUltra#Origin_of_the_project
https://fringe.fandom.com/wiki/Dream_Logic
https://en.wikipedia.org/wiki/The_Sleep_Room
https://en.wikipedia.org/wiki/MK_Ultra_(film)
https://en.wikipedia.org/wiki/The_Agency_(1980_film) , https://www.youtube.com/watch?v=KgNwiYO4mwU , https://www.imdb.com/title/tt0081989/
https://en.wikipedia.org/wiki/Dreamscape_(1984_film)#Plot
https://en.wikipedia.org/wiki/Brainwashing#Scientific_research
https://en.wikipedia.org/wiki/Brainwashing#In_popular_culture