I Dream of Jeannie Cusamano - S1-E13
Revealing mistake: When the shrink locks the door on Tony, they argue and she calls the police. When she finally calms down she approaches the door to unlock it but you can see the door move before she ever sticks a key in it or touches the knob. (00:25:20)
The Legend of Tennessee Moltisanti - S1-E8
Revealing mistake: Christopher is in the pastry shop. When his head is turned to the left, an earpiece can be seen in his ear. (00:17:35)
Revealing mistake: When Tony buys the orange juice off the street vendor (just before he is attacked by the hitmen) you can see the magazines on the vendor's stand being blown around by the "heavy winds" that are present throughout the episode. However, if you look behind Tony, you can see the scenery is almost completely still. The "wind" is coming from just off camera. (00:27:17)
Revealing mistake: When Tony collapses in his back garden, and the barbecue grill explodes, some coals (supposedly thrown into the air by the explosion) land next to Tony's body. Watch this moment closely however and you can see that the coals come into shot from left of the screen and not above from the air as they should. Obviously thrown in by a nearby crew member, just off-screen. (00:19:48)
I Dream of Jeannie Cusamano - S1-E13
Revealing mistake: When Artie visits Livia at the hospital there is a close-up of the newspaper that Livia is reading and it is obviously fake. Some of the articles look like they have been pasted into it and there are white strips of paper covering up headlines or replacing them with new ones. (00:16:50)
Answer: Yup, just like Nicholas Lea was chosen to play Alex Krycek on the X-files after showing up on 1 episode as a different character.
Grumpy Scot