When Rita and Dexter are inside the shed, the window blind is partially open. When they go outside to lock the door, the blind is fully closed.
Deb's hair goes from being behind her right ear to in front and back again during the conversation with Quinn in her office at about the 20 minute mark.
(at around 39 mins) Dexter sits at his desk and looks over a flyer given to him by Trinity. On the flyer, the word rejuvenating it spelled wrong, it says rejuvinating.
When discussing the DNA, Dexter and Masuka say that the cremated bone DNA could come from a female related to Trinity; either his mother, sister, or daughter. This is incorrect. Mitochondrial DNA, which is the DNA that the 2 samples share, can only be passed down from mother to children, so Trinity's daughter would not have this shared DNA, only his mother, sister, or brother. Also, Mitochondrial DNA does not indicate the sex of the person.