Continuity mistake: When Will enters the backstage washroom to tell Jack that he can make fun of him on stage, Jack puts the blue flannel in the sink, so that we can't see it. In the next shot the flannel is hanging out, over the sink's edge. (00:17:35)
Continuity mistake: Will squirts Jack with his bottle of water, the water level obviously drops quite a bit, in the bottle. But in the next shots, the bottle is filled right up to the top once again. (00:10:00)
It's the Gay Pumpkin, Charlie Brown - S5-E5
Visible crew/equipment: When Grace has stopped and is trying to fix her bike, a red car passes her, splashing up mud all over her. As the car passes the camera, the whole crew and equipment is clearly reflected in the side.
Continuity mistake: After Jack and Karen have locked Will and Grace in the bouncy castle, they talks to each other through the netting. Between each shot, Grace's purse constantly moves from on her elbow, to up on her shoulder.
The Kid Stays Out of the Picture - S5-E3
Continuity mistake: After Will opens his present from Grace, he puts the black "Sharper Image" bag down on the table. In following shots, the position of the bag has changed, it rotates and changes from open to closed, and vice versa.
...And the Horse He Rode in On - S5-E1
Continuity mistake: When Leo helps Grace after she runs into the lamppost, the camera alternates between two angles. Between these different angles, a park bench, beside Leo's white horse, disappears and reappears constantly.
Lows in the Mid-Eighties (1) - S3-E8
Continuity mistake: When Jack invites Pam over to their table to talk, the direction that the label on the champagne bottle faces changes between shots. (00:43:40)
Continuity mistake: When Jack is telling Will and Karen what he was doing at the hospital, as he says "a little over the smock fondling..." Will begins to drink his wine, yet in the next shot, we can see in the mirror that he isn't. (00:10:00)
Continuity mistake: When Jack gets James Earl Jones on stage to perform, his glasses hanging around his neck go from folded, to unfolded then folded up again so he can unfold them and put them on. (00:12:40)
Continuity mistake: When Karen pours a cup of coffee, the coffee is old, so she pours the coffee out of the window and puts the blue mug in a large see-thru plastic container. In the next shot the mug has vanished. (00:10:45)
Oh Dad, Poor Dad, He's Kept Me in the Closet and I'm So Sad - S2-E13
Continuity mistake: When Jack meets his father in the restaurant, his father says that he got a phone call from Karen Walker. When Jack says, "Wow," there is no sign of his arms being crossed, but when it cuts and Jack says, "I got the same phone call," his arms are suddenly crossed. (00:11:20)
The Truth About Will & Dogs - S1-E10
Visible crew/equipment: In most of Season One at least (choosing a specific moment here), Will and Grace have a large ornamental silver ball in their living room, which always reflects the studio lights and the fact that there is no fourth wall to the apartment. (00:27:35)
Visible crew/equipment: When Grace asks Will for his advice on where her mirror in her new apartment should go, she goes running to the wall and when she does, the camera pans over and you can see that the wall stops, revealing it to be a set.
My Best Friend's Tush - S2-E22
Continuity mistake: When Jack throws the butt-puppet at Will, and storms out of the room, one of the pantyhose legs unravels and hangs down. In the next shot it's shorter and wrapped back around. (00:13:30)
Visible crew/equipment: When Karen stands by the pillar she says "I want to talk to Ja...Wi...Rosario" and as she does, Jack and Will step forward. Anyway, you can see two white tape markers on the floor which they stop at. (01:13:50)
Continuity mistake: When Will is cleaning the tray, and in all following shots, from when he leaves the room, to when Karen walks over to Grace, to tell her to go get Campbell, there is a wine bottle which keeps jumping from the edge of the blue sink counter, to the edge of the counter which has the cooking gas-hobs on it. (00:09:55)
Continuity mistake: When Dr. Hershberg begins to cry about the bad news he delivered in the other room, he goes over to cry by the small table with items on it. During this part, the grey box sitting on the table keep opening, closing, moving etc. (00:04:50)
Continuity mistake: When Will and Grace are talking to Karen outside, as she sits on the bench, about how they'll always be a family, the people walking past them on the street behind keep changing, appears, disappearing etc. between shots.
