You mean https://en.wikipedia.org/wiki/Subliminal_stimuli as claimed by https://en.wikipedia.org/wiki/James_Vicary / https://www.bbc.com/news/magazine-30878843 ?

https://en.wikipedia.org/wiki/Programming_the_Nation%3F

https://en.wikipedia.org/wiki/They_Live !

Now playing Tiga & Zyntherius - Sunglasses at Night https://www.youtube.com/watch?v=2kE8565_xrc

(Corey Hart 1983 cover https://en.wikipedia.org/wiki/Sunglasses_at_Night )