Factual error: Any time FBI agents enter Mexico, they are always armed. Mexican law prohibits U.S. Agents from bringing weapons into Mexico.
The Mentalist (2008)
1 factual error in show generally - chronological order
Starring: Robin Tunney, Simon Baker, Owain Yeoman, Tim Kang
Revealing mistake: Any time any character is driving a Suburban, or any other vehicle with a column mounted shift lever, the shifter is in park while they appear to be driving.
Teresa Lisbon: I don't think I've said this. I mean, I know I haven't said this, but I don't really know if I need to, because you always know what I'm thinking.
Patrick Jane: Well, not everything.
Teresa Lisbon: Would you be surprised if I said I love you?
Patrick Jane: I'd be... I'd be lying if didn't say I would be moved by that.
Teresa Lisbon: I love you.
Trivia: At the time the episode was shooting, Lucy Davis, who plays the victim's widow, was married to Owain Yeoman.