Leave It To Beaver (1957)

Beaver's Tree - S3-E8

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)

Beaver's Pigeons - S2-E20

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)

Season 5 generally

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?

Her Idol - S2-E6

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)

Beaver Becomes a Hero - S4-E3

Character mistake: When Ward is reading the article in the paper about Beaver saving a girl from drowning ("Local Boy in Lake Rescue"), the headline spells his name "Theodour." The misspelled headline is shown twice. (00:11:25 - 00:13:10)

It's a Small World - S1-E1

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.

The Pipe - S2-E9

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.

Wally's Girl Trouble - S1-E10

Continuity mistake: When Beaver goes to Penny's front door, the door changes in appearance from one shot to the next. (00:23:05)

Wally's Test - S3-E17

Character mistake: As Eddie Haskell and Lumpy Rutherford return from the washroom to Mr. Gannon's history class, Mr. Gannon calls Eddie "Louis."

Beaver, the Caddie - S6-E21

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)

The Dramatic Club - S4-E24

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.

The Dramatic Club - S4-E24

Continuity mistake: When June is talking to Wally, she's wearing a wristwatch and her wedding ring on her left hand. But in a close-up shot of her hands while she's making a sandwich, her left hand is bare with no watch or ring. Back to the wide shot, and the watch and ring are on her hand again. (00:05:25)

The Perfect Father - S1-E23

Continuity mistake: As the boys are playing basketball at the Cleavers' house, "Tuey" is shown in the first shot without his glasses, yet immediately in the next shot where he shoots for a basket, he is wearing them. Magical Glasses, indeed.

Wally's Girl Trouble - S1-E10

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)

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.

The School Picture - S4-E30

Deliberate mistake: Although it was done for plot purposes, no school photographer would only take just one shot of a class photo. They generally take up to 15 to 20, as it is difficult to get everyone to look at the camera and smile at once (and hopefully not pull silly faces).

Lumpy's Scholarship - S6-E24

Continuity mistake: In "The Credit Card" four episodes before this one, Eddie uses the $15.00 that Wally pays him from a loan to buy a vest. Later Eddie has to give the vest to a friend in order to get back money owed to Eddie's father. But in this episode we see Eddie at Lumpy's party wearing the very same vest.

Beaver, the Caddie - S6-E21

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.

Beaver's Dance - S3-E21

Continuity mistake: There are a couple of continuity errors in the dance scene: First, the 4 girls sitting across from the boys switch positions from one shot to the next, then the last girl (long dark hair) disappears from the row of girls entirely, only to show up on the dance floor later in the scene. She was across from (and should have been paired up with) Beaver; instead, the teacher nods toward a now-empty chair and remarks that they "ran out of girls". (00:08:00)