Mr. Monk Is At Your Service - S5-E12
Visible crew/equipment: In the scene where Natalie arrives to the dinner party "pregnant" and Mr. Monk is going to "help her with her coat" there is a female crew member on the other side of the sliding door (to the left of the door). (00:31:25)
Visible crew/equipment: In the flashback of the murderer slamming the car door on the victim's neck and breaking it, we get a clear shot of the cameraman and his camera in the car door (CSI's favorite blooper).
Visible crew/equipment: Dutch and Claudette are watching an interrogation video of the Margos with Armin Chorekian. Just before the scene changes, the boom mic bobs down into the shot above Armins' head for a split second. (00:14:40)
Reformation - S3-E10
Visible crew/equipment: During the opening sequence when two hoodlums are walking out of the convenience store, a lighting rig and crew can be seen on the right-most part of the frame. (00:02:15)
All for One - S5-E4
Visible crew/equipment: When Malia points the gun to the dealer, for a second you can see two finger tips at the right edge of the screen. There is no other in the alley and it can't be the dealer because the angle would be wrong. (00:29:20)