Black Mirror: Plaything

In the latest season of Black Mirror, without getting into spoilers, “Plaything” features a man who had a mind-expanding, drug-assisted experience with an alternative form of life and repeatedly asks for a pen (and paper, because he didn’t have either), so that he might deliver a message to his interrogators. I don’t know if it was an intentional easter egg referencing Rosetta Stoned, but for those who saw this episode, was anyone else thinking the same thing??? Sorry if this does not belong in this sub.