Visible crew/equipment: The shadow of the boom mike is visible in the background when Wally is saying that June looks "ritzy". (00:14:45)
Visible crew/equipment: As Ward and June are discussing the pigeons, the camera moves in for a close-up - and its shadow becomes visible on the left sleeve of June's dress. (00:11:40)
Wally's Practical Joke - S6-E35
Visible crew/equipment: When Eddie Haskell comes over to scheme getting back at Lumpy, just as Eddie, Wally and Beaver are heading up the stairs, a mike boom is visible in the upper left corner.
Visible crew/equipment: When Aunt Martha enters the front hall, as June is leaving, the shadow of a mic boom is visible as she comes in and as she leaves. It's visible on the top left.
Visible crew/equipment: Beaver is pretending to have a football game with himself. You can see the boom mic shadow to the left of him and it continues all the way to when Wally and Beaver go sit on the bench. (00:10:45 - 00:11:11)
Visible crew/equipment: As Beaver, Gilbert and the golfers walk toward the camera and continue offscreen at the end of the episode, the shadow of a man wearing glasses falls on them (none of the actors were wearing glasses). (00:23:25)
Eddie, the Businessman - S6-E6
Visible crew/equipment: June and Ward are in the kitchen, Eddie leaves and Ward and June continue talking about Eddie and Wally getting hired at the dairy. The next scene shows the exterior of the house, and a dark figure is seen walking from the house toward the garage on the left side of the screen.
Visible crew/equipment: When Beaver works as caddie the second time, the group are at the 18th hole. As Messrs Langley and Howard walk off-screen to the right, the camera crew's shadows can be seen on the actors' sweaters.