Continuity mistake: When Trish is talking to Jess on the phone, she pours herself a glass of water and places the bottle of water down to her left. In a brief shot just before her nose starts to bleed, the bottle is suddenly to her right, and then back to her left. (00:45:25)
Continuity mistake: As Jessica rips the phone receiver off, in the background Luke can be seen already breaking the bottle and punching the guy as he is shown doing later. If you think this can be somehow justified as an editing trick to show something happening simultaneously, it's not: Jessica witnesses the jealous husband breaking a bottle on Luke's head, but in similar fashion when she has to turn and dodge the punch of the guy who calls her a "psycho", there it is, the bottle-breaking bit happening in the background, behind her. (00:36:00)
Continuity mistake: Jessica is sorting the material for her investigation: when you see her lay down on the table a paper with a yellow sticker on top, look at her reach for the glass. On the table now in front of her there's a pile of pictures just as the scene started. Back to the overhead shot, and papers and pictures are arranged again neatly, including the yellow post-it. (00:17:00)
Continuity mistake: During the interrogation at the beginning of the episode, the blue folder frequently changes position between shots. (00:02:00)