Continuité: The fact that there was a year's gap between the filming of the pilot episode and the first season's episode is evident in the different hairstyles sported by some of the cast. Although only a night is meant to have passed between the episodes, James Hurley, Sheriff Truman, and Deputy Brennan all have shorter haircuts by the next day. Donna Hayward, Catherine Martell and Audrey Horne (in particular) all have noticeably longer hair by the next day.
Continuité: Catherine Martell's first name is spelled as "Katherine" in the pilot episode's opening credits, but as "Catherine" in all other episodes.
Erreurs faites par les personnages (éventuellement des erreurs délibérées par les cinéastes): In the first season, Doc Hayward reveals that the blood in the Leo's shirt is a "rare type AB-", and says that this is Jacques Renualt's blood type. In the second season premiere, when Albert Rosenfield and Cooper explains the Laura's murder, they said that the blood of the killer is "AB-, not of Ronnette, Leo or Jacques".