Continuity mistake: In this episode Blanche says she has had 4 children, but she has never owned a Mercedes. She offers one of her three sons (named Biff, Doug and Skippy) to Dorothy in order to let her keep the car. In other episodes she mentions daughters Rebecca and Janet frequently, and in the "To Catch a Neighbor" episode she mentions a son, Matthew, who is a CPA. That's at least six children by my count.
Continuity mistake: When Blanche returns from a date with Ted (Stan's brother) she puts her pocketbook on the back of the kitchen chair then sits down. In a wide shot of the girls sitting at the table she still has the pocketbook on her shoulder/arm.
My Brother, My Father - S3-E17
Continuity mistake: About three minutes into the show Dorothy, Sophia and Stan are in the living room. Sophia is trying to convince them to pretend they are still married while uncle Angelo is visiting. Dorothy is wearing a large pair of earrings, but at one point during their discussion when they show a close up of her, the left earring is suddenly missing. A second close up shows the earring still missing, but as Dorothy turns her back to the camera, she reaches up and touches the remaining earring. In her next close up, she is wearing both earrings again.
My Brother, My Father - S3-E17
Continuity mistake: Angelo claims he promised their mother on her deathbed that he would become a priest, and Sophia says she promised she would marry someone else - and we assume she died before Sophia or Angelo got married to their spouses. However, in the episode where they are flashing back for Mother's Day, Sophia's mother is in this episode along with Sal (and she looks like an older version of Dorothy).
Yes, We Have No Havanas - S4-E1
Continuity mistake: At Fidel's funeral, Sophia talks about him awakening feelings that she had not felt in 35 years. But earlier in the episode, Dorothy said that her father/Sophia's husband has been dead for 27 years. Also earlier, Sophia claimed to have showered with a man 22 years ago.
The Days and Nights of Sophia Petrillo - S4-E2
Continuity mistake: Dorothy mentions that her Grandma, the mother of Sophia, died at 94 when Dorothy was 6. However, in the season 3 finale, there was an entire scene showing Sophia's mother visiting Sophia and Salvadore on Mother's Day, accompanied by young but certainly adult Dorothy.
Brother, Can You Spare That Jacket? - S4-E8
Continuity mistake: At the end of the episode, the girls regroup after looking for the winning scratch-off ticket and Blanche says she found it. At that moment, she is not holding her purse, however in the very next shot, after the priest enters the room, she's suddenly holding her purse again without the girls ever having moved from their spots.
Continuity mistake: In this episode Rose says her cat Fluffy died (as a lie) and Dorothy says "Rose, you've never had a cat, you're allergic." When Blanche and Rose first meet she is holding a cat named Mr. Peepers, and looking for a place she and the cat can live. Another episode she says she had a cat named Lindstrom Lindstrom.
Suggested correction: After first meeting Blanche at the supermarket, Rose gave Mr. Peepers to a boy there. Dorothy could actually mean that Rose has never owned a cat for as long as Dorothy has known her. Regarding the allergies, people can be allergic to some cats, but not others. Or they will choose to live with a cat despite the allergies.
In another episode, Rose mentions her dog Rusty saved the family cat from a fire so she definitely lived with a cat for longer.
Continuity mistake: When the girls are singing to the baby, the blankets keep disappearing and reappearing on the baby carriage.
Continuity mistake: In this episode, Dorothy's son, Michael, is said to be thirty years old. When he married his wife in the season 3 episode "Mixed Blessings", he was said to be 23.
Continuity mistake: At Big Daddy's (Blanche's father) funeral/passing, Blanche shows Dorothy around her childhood home but it was revealed in season 1 episode 24 that Big Daddy had sold the property to pay for a music tour and to escape the constant reminder of his late wife, the house was named Twin oaks.
Clinton Avenue Memoirs - S5-E16
Continuity mistake: The front door of Sophia's former apartment is on the right wall, under the stairs. The fireplace is on the far back wall to the left, next to the foot of the stairs. But in the earlier episode, "A Piece of Cake", the front door is next to the stairs, there is no fireplace, and Sophia's bedroom door is where the front door is in "Clinton Avenue Memoirs".
If At Last You Do Succeed - S6-E3
Continuity mistake: In the scene where Stan stops by the house to have Dorothy help him tie the bow tie of his tuxedo, the undone tie is hung around his neck. After Dorothy finishes tying the bow tie and Stan proceeds to leave, she stops him to tell him to return in an hour. He excitedly turns around towards her, at which point we can see that the bow tie is now a clip-on. (00:18:55 - 00:20:55)
Wham, Bam, Thank You, Mammy - S6-E5
Continuity mistake: When Mammy Watkins first hands the letters over to Blanche, the ribbons holding them together are knotted but the knot is on the bottom of the pile, and the strands are quite long. When Blanche reaches for them, the knot is on the top, it is now tied in a bow, and the strands are much shorter and neater.
Miles to Go - S6-E15
Continuity mistake: In this episode Rose's boyfriend Miles is revealed to be in the witness protection program and has not had any contact with people from his past including family. However, in season 5, episode 15 his daughter visited and didn't approve of Rose.
There Goes the Bride (1) - S6-E16
Continuity mistake: At the beginning of the episode, Rose says that Miles is in Europe with some students. The episode immediately before this one, however, revealed Miles being put back into a witness protection program, and leaving Rose.
There Goes the Bride (1) - S6-E16
Continuity mistake: As the show begins, an outside shot of the house shows that it is night. Then it cuts to the scene of Blanche and Sophia playing Chess in the kitchen - when Blanche is complaining about Sophia's "do-overs" you can see outside the kitchen window and it is daytime. After Rose walks in about 30 seconds later, you can see that it is night again.
Continuity mistake: In earlier episodes we are told Blanche's middle name is "Marie", such as in the episode, "Wham, Bam, Thank You, Mammy" where in her ex-mammy calls her by her full maiden name (Blanche Marie Hollingsworth). But in this episode, she brings out her diaries to try to locate if she slept with Rose's husband Charlie, and the intials are B.E.D. - which stood for Blanche Elizabeth Devereaux.
The Case of the Libertine Belle - S7-E2
Continuity mistake: When they bring out the cake, all the candles are lit, then one candle is lit, then none, then back to one again with no one touching the cake.
Journey to the Center of Attention - S7-E19
Continuity mistake: In the first scene of the show, Dorothy has a bowl of popcorn on her lap. The amount of popcorn changes between shots. At one point it's overflowing, and at another it's about half full.