Other mistake: The opening credits for season 5 show June coming out of the front door with a pitcher of what looks like iced tea, and calling for Ward, Wally and Beaver who are all working outside. But the door opens by itself as she comes out, and then closes by itself behind her. If the entire family is outside, who opened and closed the door?
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)
Character mistake: As Eddie Haskell and Lumpy Rutherford return from the washroom to Mr. Gannon's history class, Mr. Gannon calls Eddie "Louis."
Continuity mistake: As the boys are playing basketball at the Cleavers' house, Tooey is shown in the first shot without his glasses, but immediately in the next shot where he shoots for a basket, he is wearing them. Magical glasses, indeed.
School Play - S2-E11
Continuity mistake: After the school festival performance, when Beaver reveals himself as the mushroom, the two costume straps hang straight down over Beaver's shoulders, but in the wide shot the two straps are crisscrossed, then reverts back to the original way. (00:22:20)
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.
Continuity mistake: When Ward is talking to Beaver in the bedroom, he stands behind Beaver and is in the process of combing his hair. When Ward sits on the dresser, Beaver's hair has somehow finished being combed. (00:24:18)
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)
Continuity mistake: Beaver has a frog in hand when Wally is on the phone, then it is not there when Wally hangs up the phone. (00:10:35)
Continuity mistake: Beaver gets his tonsils out in this episode, but in 3-29 "Beaver's Monkey", Beaver compared the situation in that episode to being just like when he had his tonsils out. Did they grow back?
Character mistake: The lady that talks with Miss Landers about the play calls Gilbert Bates "Gilbert Harrison."
Teacher Comes to Dinner - S3-E9
Continuity mistake: As the family is sitting at the breakfast table during one of the very first scenes, Beaver gets up to leave for school. The checkered napkin in his lap falls to the floor as he walks to the back door. The camera cuts back to the table where the napkin has magically reappeared.
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)
Continuity mistake: After Eddie and Lumpy show up to help The Beav and Wally load the lawn trash into Lumpy's car, Eddie places a lampshade and a woman's hat over a burlap bag of trash and jokes it's Lumpy's date: "Who says Lumpy can't get a girl?" Just then the camera cuts over to Lumpy who says "ha ha ha." The street is at Lumpy's back and a car is driving in the background towards Eddie. When the camera switches back to Eddie, Lumpy approaches Eddie. The car should drive past, but it never does. (00:14:37 - 00:15:40)
Continuity mistake: As Beaver and Wally are starting upstairs after Ward asks them to go change their shirts for supper, the camera cuts from a long shot of Ward across the room in a chair reading a newspaper, wearing a light grey suit, to a medium close-up of Ward wearing a much darker suit, and then back to the light grey.
Continuity mistake: In the scene where Ward helps June carry the groceries into the house, the bag in his left arm has a loaf of bread sticking out of the top, but as they enter the kitchen the bread is sticking out of the bag in his right arm. It is not even the same size.
Continuity mistake: When Linda is up in the tree talking with Beaver, her hair braids keep changing position; sometimes they're over her shoulders and sometimes not. (00:05:00)
Continuity mistake: When Beaver goes to Penny's front door, the door changes in appearance from one shot to the next. (00:23:05)
