Demon Suite Murder Case: File 2 - S1-E17
Revealing mistake: When Kindaichi looks the name up in the French dictionary, the pages are entirely made up of the same paragraph repeated over and over. (00:08:50)
Kindaichi shônen no jiken bo (1997)
1 revealing mistake in season 1 - chronological order
Starring: Taiki Matsuno, Emi Uwagawa, Kazuyuki Aijima
Wax Doll Castle Murder Case: File 2 - S1-E8
Character mistake: Hajime's proposed solution is obviously wrong, but not for the reason they mention; the 'killer' could never clean themselves up completely and effortlessly in such a short time from the soot.