Audio problem: When Reid and Morgan are walking up the stairs to the first victim's apartment they are talking, but their mouths aren't moving. (00:06:05)
Provenance - S1-E19
Audio problem: When Sarah goes to touch Evelyn's shoulder, you hear Sam's voice telling her to stop, except his mouth isn't moving at the time the phrase is being uttered. (00:23:50)
Audio problem: In episode 1x08, "Swimming With Boyd", when Lucas is talking to Julie on the street, the audio looping as he says "Listen to me" is quite noticeable - his lips don't even come close to matching what we hear.
Audio problem: Bellick gets shot in the leg and screams but in the brief shot we see his face during the sound, he isn't screaming at all. (00:23:20)