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The original was posted on /r/todayilearned by /u/Ill_Definition8074 on 2025-05-29 19:55:34+00:00.

Original Title: TIL Secret Story is a Portuguese reality show similar to Big Brother except all the houseguests have a secret. In 2011 a man was arrested under suspicion of being a serial killer known as the Lisbon Ripper after his son applied to be on the show with the secret that his dad was the Lisbon Ripper.