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)
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: 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)
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)
Visible crew/equipment: After Bengie pours the green paint all over himself, when his mother arrives, there's a chalk T-mark on the floor by the door. (00:19:45)
Visible crew/equipment: In the middle of the night, when June walks in on the boys reading Tom Sawyer by flashlight under the blanket, the shadow of the moving boom mic is visible on the wall, at the right side of the screen. (00:06:40)
Visible crew/equipment: After Beaver and Larry decide to head over to the supermarket for free food samples, when it cuts to Wally's bedroom, there's a T-mark on the floor beside his bed. (00:09:55)
Visible crew/equipment: When Wally enters the kitchen and tells June that Beaver is upstairs changing his backwards underwear, the T-mark is visible on the floor under the sink. (00:01:05)
Visible crew/equipment: While Ward and Beaver are in the garage, Ward straightens out Beaver's Olympics three-legged race misconception. Then, just as June enters the garage, the moving boom mic casts a shadow at the top left corner of the screen. (00:07:40)
Visible crew/equipment: When Tooey and Eddie come over to see Wally's "really sharp" new plaid suit, the boys go upstairs to see Wally's new crazy socks. Then, just as Ward tells June the suit looks like a horse blanket, the shadow of the moving boom mic is visible at the top right corner of the screen. (00:15:20)
New Doctor - S1-E32
Visible crew/equipment: While waiting for the new young doctor to arrive, June gives Beaver the glass of orange juice and heads downstairs. When June walks back into the kitchen just as Wally and Eddie enter the back door, there are multiple curved chalk marks visible on the floor. (00:14:25)
School Play - S2-E11
Visible crew/equipment: At the start, while Whitey is reading aloud about the school festival, there's a large chalk T-mark on the floor in front of the boy at the center, and a small T-mark on the floor between Whitey and Beaver. (00:00:45)
Visible crew/equipment: After Ward has a word with the boys about having consideration for another person's happiness, when Wally and Beaver enter the kitchen, we can see chalk marks and T-marks on the floor near the counters. (00:22:10)
Visible crew/equipment: When Ward joins June in the kitchen he asks what's up with Wally, and his actor's mark is visible on the floor, then as June walks away, her T-mark becomes visible on the floor as well. (00:06:00)
Visible crew/equipment: In the kitchen, when June tells Ward the boys finished breakfast and went back upstairs with Tom Sawyer, there's a chalk T-mark on the floor near the sink. (00:07:45)
Visible crew/equipment: While Wally and Beaver are in their bedroom, when Ward comes in to talk to them the actor's tape mark is visible on the rug beside desk, where Wally is writing the letter. (00:01:45)
Visible crew/equipment: After June tells Ward the TV set is broken so the boys have nothing to do, when Ward enters their bedroom we can see a crew member's hand in the hallway reach up to close the bedroom door. (00:01:40)
The Grass is Always Greener - S2-E15
Visible crew/equipment: When June and Wally enter the kitchen while Ward is fixing the faucet's washer, the white T-mark and another actor's mark are visible on the floor near the sink. We see it again when Ward gives Beaver the small trash bin to take out. (00:05:10 - 00:07:20)