Continuity mistake: When Will is sitting on the kitchen counter upset, he is eating butter biscuits from a tin, with the tin and the tins lid on the counter next to him. Then his mum comes in and they talk and at the end of the scene they hug; but now the biscuit tin lid has vanished although nobody touched it.
Continuity mistake: When Jack is trying to hush the audience at his show Jack-Talk after bringing Grace onto the show for a follow-up interview, between shots the little bell on his desk moves from his right (near the edge) to over past his left, near the centre of the desk with all the other items.
Continuity mistake: Shortly after arriving at their mother's house, Will's brother, Sam, nervously excuses himself from a conversation with Grace. "Excuse me," he says, "I have to go get a ladder. There's a couple of bulbs out in front, and now it just says 'Happy Ho-days.'" However, exterior shots of the front of the house show no holiday lights whatsoever.
Add timeMichael Albert
Continuity mistake: In Will and Grace's apartment, as Jack stands up to announce his news about Beverley, Will and Grace are cutting slices of cake and putting them on plates. In the next wide shot Karen (who is sitting on the sofa, away from them) had a plate with a slice of cake and a napkin, before Grace had even handed Jack any plates!
Continuity mistake: When Karen is sitting with her sister Gin at the table in the bar, throughout the whole scene Gin's black purse and the bar menu she has continually change places. In some shots she holds the menu and the black purse is on the table. In some shots the menu is on the table and the purse is on her lap. And in some shots both items are on the table.
Continuity mistake: When Will pulls down the chart which is recording Grace's pregnancy patterns, he draws a red cross in a box. In the following shots the appearance of the cross keeps changing between two obviously different crosses (from two takes edited together.)
Continuity mistake: In the scene when Will and Jack are with George Takei before he goes on Jack-Talk, Will is holding his George doll box. When Jack walks over and says "So listen, George...", Will puts his left hand in his pocket. As Jack continues to say "...now the network asked...", Will now holds the doll box with both hands instantly.
Continuity mistake: In the scene when Jack is presenting Jack-Talk and welcomes George Takei, and then Amber-Louise tells him that George got pushed back to tomorrows show, the pencils in the silver pot on Jack's desk continually change their arrangement between each shot.
Continuity mistake: When Grace opens the cardboard box that has the blue blanket in it, the lid on the box repeatedly changes from being at a straight horizontal angle (fully down) to being up and angled diagonally, as if not pushed open all the way to the fold.
Continuity mistake: In the opening scene Grace goes into the kitchen area and unpacks a brown paper bag. When Will goes to use the coffee pot, the brown bag is on the counter behind the kettle. But in the next shot the bag is in a different position, sitting on top of the kettle.
Continuity mistake: When Pam is sitting at her desk letting the phone ring without answering it and throughout the whole scene that follows, the items on her desk continuously change their positions from shot to shot and also the papers on the desk vanish and reappear a few times.
Continuity mistake: When Grace is standing in the wedding dress and Karen is talking to her and complimenting her, there is a long cream-coloured ribbon which is coiled back over her shoulder. Then in the next shot the ribbon is suddenly hanging all the way down her front. In the next shot it is back behind her shoulder.