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.
In Camelot - S5-E7
Continuity mistake: When Tony is with Fran in her apartment, he's wearing an abstract pattern polo. Then they drive to the racetrack. At the racetrack, Tony's shirt is the same style, but the pattern is different. Then, when Tony is with Hesh, his polo reverts back to the original pattern.
Irregular Around the Margins - S5-E5
Continuity mistake: At the hospital waiting in the car for the emergency room doctor it's pouring rain. However, when Tony and Tony B get out to talk with the doctor it's not raining and starts to rain once they get back into the car. (00:42:24)
Continuity mistake: Valentina is sitting and reading a magazine when Tony enters her hospital room. She places the magazine on her lap. Throughout the scene the magazine appears on her lap when the camera is on Tony and disappears when the camera is on Valentina. (00:18:57)
Irregular Around the Margins - S5-E5
Continuity mistake: Adriana was wearing a red blouse at the Crazy Horse, and in the car with Tony during the accident. When Christopher picks her up from hospital, she is wearing a gray Fila sweatsuit jacket. It's funny she is wearing something different because the next morning at the hospital, Tony is wearing the same shirt he had on during the accident. (00:23:57 - 00:29:04)
Irregular Around the Margins - S5-E5
Other mistake: The Soprano crew takes Christopher out to a cornfield to talk some sense into him or whack him. It's raining and the ground is wet but only Tony B is getting wet. (00:41:18)
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.