Continuity mistake: In episode "The good, the Bad and the Dominatrix" When Sara takes the photos of Lady Heather's neck bruising you see 2 distinct ligature marks. When Brass serves her with the search warrant you can see only the remnants of one ligature mark then when she is in Brass' office later she again has 2 ligature marks.
Continuity mistake: Series 7 - Part 1: When Sara and Warrick are at the table discussing the case, Sara's box containing her veggie sandwich changes position depending on whether the camera is looking at her or Warrick. (It moves from directly in front of Sara, and then several inches to her right toward the edge of the table).
Continuity mistake: Outside the brothel, there is an orange post next to the old man's trailer. Suddenly, it is gone in the second scene where the old man is approaching. In the third scene there is one again, but this time it is an orange cone instead of an orange post.
Continuity mistake: When the woman first falls through the glass, she obviously breaks it all, toward the bottom of the window. Then her position changes and there is cracked glass in place. We then see several more shots of the dead woman, none of which have matching blood spatter or position of her body.
Continuity mistake: In the scene just after Hodges and Greg find the seafood they were hunting for in the "Pleasure Providers'" stations or whatnot, Hodges collects a sample of the shrimp by cutting off a little piece. He picks it up with his fingers. In the very next frame, the shrimp piece is in tweezers. Lightning speed.