“Yeah, I guess. So I'm looking at the Unsolved Mysteries…” — Perhaps It's You at 36:21

Perhaps It's You S6 Ep9: Nothing but Suspicions

“Yeah, I guess. So I'm looking at the Unsolved Mysteries wiki, which does say this is solved, but apparently this is much later. So in 2005, the Mona Lisa was finally identified as a woman named Lisa del Giacondo after researchers discovered a margin note written by a friend of Leonardo's that said that the portrait…”