Friends (1994)

S3E18 The One with the Hypnosis Tape

Monica gets an intriguing tip from an admirer that could lead to a significant financial gain, prompting her to date him. Meanwhile, Chandler uses a hypnosis tape designed to help him quit smoking, but it results in an unexpected and bizarre outcome. Additionally, Phoebe is taken aback when her 18-year-old half-brother, Frank Jr., reveals he is marrying a woman who is over twice his age, leaving her feeling unsettled about the surprising news.