Plot summary
Detective Lassiter gives Shawn and Gus a case involving a man who believes he was abducted by aliens. Shawn discovers clues from the man to prove that the man was not abducted, but was drugged and likely robbed. When Shawn goes to where the man says he woke up, the police are already there with another man, in the same situation. Shortly afterwards, the police discover another man in the same place, but this time, the victim is dead. A lead takes Shawn to an Irish-themed pub, where speed-dating is held. To get more information, Shawn, Gus, and several detectives go undercover in the speed dating event. They discover several suspects, but none could have been the perpetrator. Police arrest the man running the event, who Shawn realizes is the actual criminal, as well as his wife, who is disguised as one of the speed daters.
Credits
Adapted from Wikipedia contributors, Psych season 1. HTML formatting and reference markers removed.