Revealing mistake: After Tony's unsuccessful meeting with Johnny due to Christopher's inability to keep his mouth shut, while Tony and Chris are driving past stores, we can see the reflections of the filming equipment attached to the roof of their vehicle.
Visible crew/equipment: After Tony gets written up for speeding, it then cuts to Bryan Spatafore parking his pickup at the curb, and just as the pickup's door opens and closes, we can see the reflection of the boom mic on the vehicle's door and window.
The Telltale Moozadell - S3-E9
Visible crew/equipment: After their school meeting about AJ, while Tony and Carmela walk outside talking about AJ's lack of punishment, as the camera moves backwards, the camera's dolly track is visible at the right side of the screen.
To Save Us All From Satan's Power - S3-E10
Visible crew/equipment: After the little boy cusses at Santa (Bobby), when both Silvio and Paulie tell the boy to go apologise to Santa, in the wide shot as the boy walks back, we can see a red T-mark taped to the floor in front of the boy's mother.
Visible crew/equipment: Paulie and Christopher convince Tony to head out and try to locate them, and to bring them food as well as shoes for Paulie. In the wide shot, just as Tony puts on his shoes and tells Gloria, "I gotta go," there's a red T-mark on the wood floor at the lower left side of the screen.
Visible crew/equipment: When Tony and Pontecorvo pull up to the clubhouse in the golf cart, as Tony walks toward the neurologist, there's a red T-mark on the ground at the bottom left corner of the screen.
Visible crew/equipment: When Tony and Carmela are in their kitchen, Tony looks in the fridge and cabinet. Then, just as Tony takes a seat at the table, an actor's T-mark becomes visible on the floor in front of the fridge, behind Tony.
Visible crew/equipment: After Carmela and Janice apologise to each other, Carmela asks Janice to lower her music, and when Janice closes the bedroom door, lighting equipment is visible at the right side of the screen.
Visible crew/equipment: At the hotel's complimentary breakfast buffet, Paulie loads up a plate filled with Danish and Yoplait for the drive down to Florida. It then cuts to the Wycoff Therapeutic Center, and at the start of this first shot, we can see the boom operator (papers in the back pocket) with left arm up, at the right side of the screen. The reflection of the moving boom pole is also visible over the fireplace mantle.
I Dream of Jeannie Cusamano - S1-E13
Continuity mistake: Tony, Carmela, and the kids end up at Nuovo Vesuvio during the storm. When Artie serves the dinner, AJ picks up a piece of pasta with his fingers, and in the shot facing Tony as he reaches across the table to AJ, he's holding his dinner knife, but in the next shot facing AJ, it's a fork in Tony's outstretched hand, not the knife.
Visible crew/equipment: After Dr. Melfi tells Tony, "I know seniors who are inspired and inspiring," when it cuts to Christopher and Brendan waiting outside the club, the red T-mark taped to the ground is visible at Adriana's feet.
Continuity mistake: When Tony shows up at Livia's house with a bouquet of flowers, in the exterior shot note the transparency of the screen door's glass, the front door silver-color knob with its back plate, as well as the deadbolt cylinder. As Tony enters the doorway in the next interior shot, we cannot see out through the screen door's glass, the door knob is gold-color, and both the knob's back plate and the deadbolt cylinder have vanished.
Visible crew/equipment: Livia tells Tony that Junior was looking for him and that he sounded agitated. It then cuts to a long shot of Satriale's, and at the right side of the screen, we can see the reflection of the boom operator holding up the boom pole/mic.
Visible crew/equipment: When the load of DVD players is brought to Bada Bing, just as the guys begin removing the boxes from the car's trunk, the reflections of the crew and the boom pole are visible on the car's surface.
Denial, Anger, Acceptance - S1-E3
Visible crew/equipment: When Tony and the other guys visit Jackie at the hospital, there's an actor's tape mark (toe box type) on the floor, between the bed and the green chair.
Pax Soprana - S1-E6
Visible crew/equipment: When Mikey Palmice arrives at the poker game and begins to pummel Sammy, an actor's red tape mark is visible on the floor under the card table.
Continuity mistake: At the hospital, when Agent Harris presents his business card in case Tony changes his mind, Harris holds his card at its bottom so it's up over his hand, but in the next shot facing Tony, Harris holds the card at its top so it's below his hand, and it continues this way in the next shot as Carmela takes it from his hand.
Visible crew/equipment: After Paulie and Silvio hug AJ and Meadow at the hospital, when Meadow tells them Tony is with Carmela, we can see the boom pole and mic's moving reflection on the glass, at the top of the screen. Then, as AJ tells Meadow that he doesn't believe it was a carjacking, the mic's reflection dips into view again on the glass.
Visible crew/equipment: While Corrado and Mikey are at Mariolina's wake, just as Corrado says, "Where he spills his guts on some shrink's carpet," we can see the yellow tape mark on the carpet where Corrado had been standing.
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)
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.