Knight in White Satin Armor - S2-E12
Continuity mistake: When Tony says goodbye to Janice by the bus. A black fella in a hat has already walked past them both. But as the camera angle changes. The same fella walks past them again from 5 yards further back. (00:54:14)
Continuity mistake: Meadow takes the carton of milk out of the fridge and leaves it on the counter. Tony gets up and opens the fridge and the carton of milk is back inside. (00:11:01 - 00:11:53)
Continuity mistake: Towards the end of the episode Carmella is reading a book on real estate. When a close up of the book is shown, she is at the beginning of chapter 1, yet when the camera angle changes she is about halfway through the book.
The Strong, Silent Type - S4-E10
Continuity mistake: Tony gives Corrado a glass of wine, holding it from the sides. A frame later his hand is on top of the glass.
Continuity mistake: When Artie visits Tony, he runs to the bathroom. Later in the scene, Artie and Carmela help Tony up to go to the bathroom, but Artie says, "Where're we headed?" as though he didn't know where the bathroom was.
Continuity mistake: Ralph's left ear is pierced. The prop of his cut head is not.
Christopher - S4-E3
Continuity mistake: When Gabriella confronts Father Phil about the public speaker, the cannoli that Father Phil has in front of him changes halfway through the scene.
Other mistake: The set-up of Dr Melfi's office makes no sense. Her office is in a building with other doctors, but there are windows on the right side of her office where another doctor's office is.
For All Debts Public and Private - S4-E1
Continuity mistake: When Chris places the twenty dollar bill on the fridge, there's a picture of a fat kid next to it. Depending on the angle, a paper covers/not part of the photo.
Revealing mistake: Jackie is shot in the head, and not only does his head not burst, but the snow mount in front is already covered all over in blood before he falls.
Audio problem: When Tony confronts Carmela in the backyard about the pool having been drained, when the shot changes to a camera angle inside the empty pool and Tony says "I thought we were getting along better lately", his lips don't match his lines. (00:15:49)
Character mistake: During an argument between Tony and Carmela, they mention her ring, given to her in earlier episode. They refer to it as an emerald. It is a sapphire.
Continuity mistake: When Christopher is trying to get rid of the body into the bin, his arms are constantly changing between crossed and hanging at his side. (00:30:30)
The Strong, Silent Type - S4-E10
Revealing mistake: Christopher is high from shooting heroin and sits on Adriana's dog and kills it. She comes home and calls for the dog and sees her under Christopher. He picks her up and you can plainly tell its a stuffed dog.
Answer: That's not Jimmy, just a look-a-like. Jimmy's short and stout, the guy in "Christopher" episode is tall and medium built. The hair is also different.