Boo! Humbug - S1-E5
Continuity mistake: When Will and Grace dive for the jawbreaker at the end of the episode, the silly string sprayed around the room (on the table, trolley, fireplace mantle, etc.,) is different from the previous shot of the room. (01:01:35)
Home Court Disadvantage - S6-E3
Continuity mistake: Whilst Jack is unknowingly eating pot pourri from the small glass holder, the position of it in the holder changes between shots, which is easily seen by the colours. (00:14:30)
Fagmalion Part Four: The Guy Who Loved Me - S5-E19
Continuity mistake: Karen is pretending to be a maid in her own hotel suite, as she talks to Grace. During her conversation, she throws her feather duster into the pocket, at the end of her cleaning cart. In following shots the position of the duster changes.
Hocus Focus - S4-E24
Continuity mistake: After Fannie rips open Grace's shirt and ties the bottom into a knot, the way the knot is tied and positioned changes during subsequent shots. (00:34:00)
Acting Out - S2-E14
Continuity mistake: When Grace is talking to Karen about how she has just come out of a string of bad relationships, she picks up a book of cloth samples, then a second one. In the next shot her hand is empty and she picks them both up again. (00:05:15)
Continuity mistake: When Will and Leo are in the coffee shop, a woman brings a sandwich carousel over. After the two of them take some sandwiches, the sandwiches left on the second wheel down on the carousel change position. (00:07:15)
Poker? I Don't even Like Her - S3-E19
Continuity mistake: There are two balloons, a blue and a pink one, attached to a vase of flowers in the waiting room. Between shots the pink balloon shrinks half its original size as Jack is talking about a man losing all his limbs. (00:34:25)
Acting Out - S2-E14
Continuity mistake: When Will and Grace walk down the street in the opening credits, in every shot change the people walking around and behind them on the streets change, and the cars on the street change too. (00:00:10)
Continuity mistake: When Grace storms out of Will's office, an orchid leaf falls from the pot she is carrying, onto the hallway floor. In the next shot it has vanished. (00:14:15)
Continuity mistake: As Jack is trying to open the massage table, Karen is sitting waiting: on the small table next to her is a candle. The candle alternates from lit / unlit between a few shots. (00:07:20)
Looking for Mr. Good Enough - S6-E14
Continuity mistake: In the cooking class, mostly everybody's attire changes between scenes. It is meant to be the exact same cooking class, however. Stuart's shirt, changes from yellow to red, for example. (00:05:25 - 00:12:00)
Heart Like a Wheelchair - S6-E6
Continuity mistake: When Karen and Lyle kiss on the sofa, Karen messes Lyle's hair up, so that it stands upward, yet in the next shot, his hair has flattened and neatened, suddenly. (00:11:45)
Continuity mistake: When Grace and Val sit and watch TV on the floor, between shots the wine bottle moves and a cork appears in the top of it. (00:24:40)
Lows in the Mid-Eighties (1) - S3-E8
Continuity mistake: When Will stops Grace, as they are about to have sex, they sit up in the bed, and he tells her he thinks they should wait. In the first shot Grace's black strap is falling off of her arm, yet in the next shot it's back up on her shoulder. (00:59:20)
Heart Like a Wheelchair - S6-E6
Continuity mistake: When Karen and Lyle sit down on the sofa, they put their scotch glasses down on the table, next to some magazines. During their kisses on the sofa, the glasses and magazines quite obviously rearrange themselves. (00:11:05)
It's the Gay Pumpkin, Charlie Brown - S5-E5
Continuity mistake: When Leo comes into the apartment and starts talking to Will and Grace, they're sitting at the table. Grace has a newspaper which she holds over her plate. Between shots the newspaper keeps vanishing then reappearing.
A Bunch of White Chicks Sittin' Around Talkin' - S4-E25
Continuity mistake: In the opening scene with Will, Grace, Jack and Karen, as they open the wine and talk about what they would like to accomplish in life, the newspaper disappears from the table during the scene, then reappears in a later shot. (00:47:30)
Continuity mistake: When Karen is laying on bed, looking at the leaflet Jack gave her, between shots her martini swaps from her left to her right hand. (00:26:40)
Sex, Losers and Videotape - S5-E20
Continuity mistake: When Jack leaves his class to go talk to Grace, they are all sitting. As the angle changes we can see through the glass panel that they are all standing and talking to each other literally one second later.
Continuity mistake: After Grace pours Jack some eggnog, we see the pitcher on the desk, and no eggnog is visible. It then shows Karen getting out her laptop, then back to a shot of Grace looking stunned, and now the level of eggnog in the pitcher has almost doubled. (00:01:25)
