Audio problem: When Sid hands Mac the test tube with the metal splinter, Mac says "Looks metallic". There is a full frontal shot of Mac's face, and his mouth doesn't move.
Green Piece - S5-E17
Audio problem: Season 5, episode 17 "Green Piece": When Stella is typing on the Apple keyboard she hardly lifts her fingers from the keys, yet we hear a loud clicking sound. That type of keyboard doesn't make that kind of sound, unless you pound the keys with great force. Also, the clicking sounds don't match up with her keystrokes.
Audio problem: Season 5, episode 18 "Point of No Return": When Hawkes is talking to Mac about the fibers he found, there's a brief shot of his silhouette in which his lips don't move while talking.
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 ★