Continuity mistake: Joey visits Abby at her house. When she first sits down, her arms are open and her low-cut blue blouse can be seen beneath her green jacket. There is a shot of Joey from behind her, during which her right arm is on her leg. Immediately after that, the shot switches to the front, and her arms are crossed across her chest and the green jacked is pulled tight up to her neck.
Continuity mistake: In the scene where Michael asks Joey and Gina to leave the bar, when Joey has gotten up and left and Gina is looking in the mirror, her pink handbag is in her right hand. Yet when the shot changes it is suddenly is in her left hand.
Continuity mistake: Right near the end of the episode when Donna leaves, and Joey sits on the couch, we see there is only one magazine on the couch, away from the cushion, yet in the final shot of this scene, there are two magazines under the cushion.
Other mistake: In season one when Alex got divorced, Joey and Gina talked about how Gina got divorced from Michael's father while she was still in high school. In season two, we learn that Jimmy is Michael's father. Joey didn't even know that they were together, he certainly would have known if they were married.
Continuity mistake: When Joey and Michael are talking to Roger, and everyone is drinking shots, when Joey and Michael put their glasses back down, we see that they're both on the tray, yet in a later shot, we see one of them is not on the tray any more, but further along the table.
Continuity mistake: Just after the opening credits, when Joey runs out to see Jake, Jake has one hand out in one shot and then puts the basketball in both hands. When the shot changes, his hand is out again and then he puts the basketball in both hands again.
Continuity mistake: When Michael is happy about Gina dating, we see Joey celebrate as well, he throws his hands in the air and when they come back down, they are apart, then when the shot changes, they are interlocked. Then when Joey points at Michael, he does it with his left hand and when the shot changes it is with his right hand.
Plot hole: In the episode where Joey tells Jimmy that Michael is his son and they cut of some of his hair to do a DNA test, Gina tells Michael that he is missing some hair on the back of his head. In the next shot the angle changes, we can now see the back of Michael's head, and he's not missing any hair.
Character mistake: Michael and Jimmy appears to have behavioral similarities. Joey therefore asks Gina when she slept with Jimmy, implying that he might be the father. Gina answers "22 years ago." Joey then asks how old Michael is, and Gina answers "22 years and 9 months." What? So he was born 9 months before the conception? Shouldn't he be 21 years and 3 months?
xx:xx:xxTim Skov Jacobsen