Visible crew/equipment: While Lucy and Ethel are at their charm school, when they're standing in front of Miss Emerson's desk, in the widehots a small tape mark is visible on the floor in front of Lucy's feet. Then, when Lucy and Ethel are in sweatpants there are two small tape marks on the floor, and when Ethel walks to the other side of the room to join Lucy, there's another tape mark which Vivian even looks down at to confirm her foot's position.
Ricky's Old Girlfriend - S3-E11
Continuity mistake: In Lucy's dream, when Carlota Romero comes to their apartment, Little Ricky is sitting in a highchair with a hat on his head. Although later in the scene, you see his hat fall off, the first close-up shot of Little Ricky shows him without the hat. Then immediately, when you see a wide-shot of the scene, his hat is back on his head again.
Visible crew/equipment: During the scenes at the small diner when it's open for business, such as when Marco walks in, there are two small chalk T-marks on the floor in the area near the door. The T-marks are also visible when Ethel and Fred walk back inside. (00:12:35)
Bonus Bucks - S3-E20
Visible crew/equipment: After Ricky sneaks the dollar bill into Lucy's purse he sees her stirring in bed, and when Ricky ducks down to hide from Lucy, the two curved chalk actor's marks are visible on the carpet. (00:07:15)
Visible crew/equipment: After Lucy and Mr. Beecher sign the lease, just as they all start heading toward the door, the taped T-mark is visible at the bottom of the screen at the edge of the carpet (presumably for the second camera dolly offscreen at the left). Then as Mrs. Hammond walks out, a bit of overhead set equipment can be seen at the top right side of the screen. (00:12:45)
Continuity mistake: While Lucy is at Ethel's apartment nervous about leaving the baby with Ricky she's wearing v-strap pumps, then she heads back to her apartment to get her coat and bag, but when Lucy walks into her apartment she's wearing ankle strap pumps instead. (00:16:00)
Visible crew/equipment: While Lucy starts taking notes about Ethel, Fred walks in and soon asks, "What's going on this booby hatch," then just as Lucy rushes back to the desk, we can see the end of the set wall and there's some kind of partition in front of the kitchen set. (00:02:35)
Sentimental Anniversary - S3-E15
Visible crew/equipment: When Lucy puts all the golf clubs in the bag and takes a practice swing, three tape marks are visible on the carpet near Lucy's feet and the golf bag.
Continuity mistake: While Ricky's telling the bedtime story in Spanish to Little Ricky (worth watching just for this darling scene), in the closeups of the baby in the crib, the pillow bumper has an embroidered heart with stick figures, which flips in reverse. Actually, the last closeup of Little Ricky lying down is the normal shot, but all the closeups of the baby sitting up are the flipped shots. (This pillow bumper has stick figures of Lucille Ball and Desi Arnaz, and can be seen in previous episodes). (00:06:40)
Ricky's Old Girlfriend - S3-E11
Continuity mistake: When Fred tells Ricky there's an article in the newspaper about Carlota Romero, there's a closeup of the newspaper's back page with Carlota's photo, but later when Lucy takes the newspaper (the same NY Gazette issue) from Ethel, before she turns it over we can see that the back page photo and layout are different. (00:08:30 - 00:10:20)
Home Movies - S3-E19
Plot hole: Toward the end of the episode, when the spliced-together movie is shown, there are several scenes from the movie Lucy, Fred and Ethel shot, often showing all three of them on screen at the same time. The problem is that no one else was there with them, yet the camera follows them as they move around the room. Who was running their camera?
Home Movies - S3-E19
Factual error: In the film Lucy and the others make, there is a long sequence of footage played forwards, then "mistakenly" repeated backwards. With the equipment and techniques they were using, this would have required not only making a complete copy of the segment, but also reversing the order of individual frames. Just feeding the film in backwards would have also flipped the image vertically. The result seen would be nearly impossible to produce accidentally.
Bonus Bucks - S3-E20
Continuity mistake: After Ricky takes out the extra expenses from the prize money, when starched-up Lucy walks into the office Fred's holding the last dollar bill, and in the closeup of Ethel's and Fred's shocked reactions to Lucy's appearance we see Lucy's hand holding the dollar, but in the next wideshot Lucy's open hand is empty so Fred gives her the dollar. (00:24:35)
Visible crew/equipment: While Ethel and Lucy are trying to frighten Mr. Beecher so he'll leave the apartment, when Lucy blows up the balloon the reflections of all the overhead set lights are visible on the balloon. (00:23:00)
Tennessee Ernie Visits - S3-E27
Continuity mistake: When Fred and Ethel leave to get the rollaway bed, note the two L-shape actor's marks on the carpet where Ernie had placed his small suitcase and then sat, earlier in the scene. (00:08:50)
Visible crew/equipment: During the scenes in the living room after wig-wearing Lucy comes home in a huff about Ricky, an actor's mark is visible on the carpet at the fireplace, and there's a T-mark on the carpet between the couch and desk.
Visible crew/equipment: When Lucy and Bert (Roberta) walk into the back of the salon, there are a few chalk marks on the floor to the right of the styling chair, and a few moments later that's where both Doug and Bert stand when Doug doesn't recognizes Lucy at first. (00:03:40)
Other mistake: When Ricky and Fred hold up the newspapers with the big holes in the back page, we see the front page with the headline "Bond Issue Defeated", and it should look familiar since it's the same front page that was used in the episode "Ricky's Old Girlfriend", with the article about Carlotta Romero. (00:18:15)
Visible crew/equipment: When Lucy tells Ricky, Fred, and Ethel that she made a carbon copy of the novel they just burned in the fireplace, the actors' tape marks are visible on the carpet when Lucy says, "Pardon me," in the wideshot. Then later, when Ricky, Fred, and Ethel walk in while Lucy's typing up her sequel, they stand at tape marks again. (00:11:05)
Continuity mistake: When Martians Lucy and Ethel are sneaking up behind everyone on the Empire State Building, in the closeup Ethel has a toy gun tucked into her belt just as she climbs over the fence, but in the next wideshot her toy gun is already lying on the observation deck floor. (00:17:25)
Answer: According to Snopes.com, there is no definitive answer, but the mid-1960s is the most verifiable date with "The Munsters" being cited as the first, although others claim "The Brady Bunch" showed the first couple seen in a double bed. An early TV show from the late 1940s titled, "Mary Kay and Johnny" is also thought to have shown the married couple's bedroom as having a double bed, although probably not with them in it. However, this was when TV was aired live, and there are no surviving episodes, only anecdotal accounts.
raywest ★
Something that is funny is that in the movie "A Christmas Story," they show the parents having two twin beds in their bedroom. In a real situation, they should have shown them having a double bed. Lucy and Ricky had twin beds pushed together in an early episode, which would have been pushing television boundaries in that time.