The Lame Duck Congress - S2-E6
Visible crew/equipment: At the end of the episode there is a camera visible in the oval office. After President Bartlet and Toby leave the office an attendant enters to turn off the lamps in the oval office. The scene widens as the lamps are turned off such that the audience can see the entire darkened room. The production equipment, a camera on tripod, and even a crewmember's leg are visible between the penultimate and final lamps being turned off. (00:41:50)