Guy Walks Into a Psychiatrist's Office - S2-E1
Plot hole: In this episode Tony tells Janice that he has just put their mother's house on the market. In season one, the house had already been sold.
Suggested correction: Tony and others say many things that aren't accurate. While season one gives the firm impression that the house is sold, it's not confirmed on screen. There may have been a deal where the intended buyer couldn't get financing or a closing never took place for other reasons.
Guy Walks Into a Psychiatrist's Office - S2-E1
Visible crew/equipment: In the scene right after Tony is talking to Janice by the pool, when it cuts to the Bada Bing and we see Chris in the mirror, there is a very noticeable cameraman standing behind him. (00:26:50)
Guy Walks Into a Psychiatrist's Office - S2-E1
Revealing mistake: Christopher is seen sniffing some lines of coke, but he is just moving the dollar bill up and down not sniffing anything at all.
Guy Walks Into a Psychiatrist's Office - S2-E1
Visible crew/equipment: While Janice and Barbara are talking at the backyard barbecue, when Paulie appears, Janice makes a crack about him not being dead yet. It then cuts to Carmela and Janice walking down the home's outdoor steps, and the reflection of the moving boom mic is visible on the front door's glass, behind Carmela.