Revealing mistake: Season 5, episode 8, "My Name is Mac Taylor": When the killer sets himself on fire, he's not wearing any gloves. In the next shot he is, to protect the stuntman from the flames.
Revealing mistake: Season 5, episode 18 "Point of No Return": When Danny fires at the bad guy, there are sparks coming from the metal pipes when his bullets hit them. One of the things causing the sparks burns too slowly, taking over a second before it fades out.
Grounds for Deception - S5-E24
Revealing mistake: When Mac shows Stella the photo of The Professor and her "mother", you see that it is the actress (Melina Kanakaredes) with a wig on.
Revealing mistake: At the end of the episode, Jamie Sunderland receives a message from her father to not look back. The closeup on the phone's display shows that the phone is offline and it is visible that the message is in fact a wallpaper.
Chosen answer: Probably to broaden the scope of the show's plot and give the audience a chance to see the characters in a different setting, People act differently at home from the way they do at their workplace. By the ninth season, the characters would have become overly familiar and predictable. It gives the writers a chance to do something different with them.
raywest ★