Visible crew/equipment: A crew member can be seen to the left of the frame when Eric walks into Simon and Ruthie's room after listening to their conversation about not being punished for leaving the house, and getting lost while trailing the mailman. (00:36:15)
Visible crew/equipment: When Kel gets up to get more water you can see one of the cameras.
What Does Blue Want to Make? - S1-E15
Visible crew/equipment: A boom mic is visible when Steve starts singing "We Just Got A Letter."
Episode #3.1 - S3-E1
Visible crew/equipment: At the beginning of the episode, when the facility is being re-opened by the military, as the soldier gets back in the truck (after opening the gates) you can see the whole film crew reflected in the truck's wing mirror. (00:01:44)