Oftentimes it's used as a simple plot device in modern television, but there are also entire works of literature that revolve around it as a theme.
If you want to read some fiction about hypnosis. give these a try:
"The Facts in the Case of M. Valdemar" by Edgar Allen Poe
"Trilby" by George du Maurier
"Pharaoh" by Boleslaw Prus
"The Manchurian Candidate" by Richard Condon
Also If you happen to be looking for THAT episode. I'm sure you'll find it somewhere...
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