Visible crew/equipment: When the guys are in Mike's office talking about George, Nicki walks in and figures out what they're up to. After Carter tells her, the shot changes to show all of the other guys trying to look inconspicuous, and a boom mic can be seen at the top-left corner of the screen.
An Affair to Remember - S1-E17
Visible crew/equipment: Just after James' tape is shown, a boom mic can be seen at the top of the screen as the camera pans out.
Visible crew/equipment: Just after the Police Commissioner mentions the Policeman's Ball after the press conference, a boom mic can be seen at the top of the screen.
Visible crew/equipment: When Mike and the Mayor are in the former's office, a boom mic can be seen at the top of the screen when Mike walks over to pour a glass of water.
Yeah Baby! - S6-E6
Factual error: When Paul demonstrates his Portuguese, the subtitles read "My monkey needs a haircut," when the translation is actually "I feel very sick."
Continuity mistake: When Charlie and Caitlin are talking in the hall, they see Paul using his new rowing machine. It is sticking a few inches out of his office. The shot changes as the pair start walking and you can see the rowing machine is now about three feet or so out of his office. (00:09:20)
My Dinner with Caitlin (a.k.a. Christmas 1999) - S4-E12
Other mistake: When Caitlin talks about Mike's "famous party mix, " she can apparently tell that there are croutons in it, but they are all completely covered by the Fruit Loops. (00:12:00)
Back to the Future IV: Judgment Day - S3-E18
Visible crew/equipment: Just as Mike is firing Owen, a black object comes from the top-right of the screen into frame. Can't really tell what bit of equipment it is, but it's most definitely not supposed to be there. (00:13:10)
Not in the Line of Fire - S3-E15
Revealing mistake: 1/3 through the show, Stuart is talking to Nicki's boyfriend in the cafeteria, and the candy machine has "N&Ns" in it instead of "M&Ms" for both plain and peanut. The letters have been partially covered up.