Between a Rock and Harlan's Place - S1-E4
Continuity mistake: When Will and Grace are eating dinner, Will has his knife and fork in his hands, but in the very next closeup he his wine glass in his hand. (01:05:00)
Boo! Humbug - S1-E5
Continuity mistake: When Jack and Karen are downtown on the streets, Karen wears a red shawl, and in one shot she pulls it up so it is over her shoulders, but in the next shot it is down by her elbows. (00:53:25)
Boo! Humbug - S1-E5
Continuity mistake: When Will and Grace are taking the kids around the flats trick or treating, as Will and Grace enter the lift, the kids stand in the hall and their pumpkin bags have faces, but in the next shot they are plain orange. (00:56:05)
Boo! Humbug - S1-E5
Continuity mistake: When Will grabs the silly string from the table, he pulls off the yellow lid and drops it to the floor. In the next shot the lid is on the coffee table. It alternates from on the table/floor for a few following shots as well. (00:59:25)
Boo! Humbug - S1-E5
Continuity mistake: When the father comes to pick up his children, the plastic pumpkin goody-bag moves from the edge to the centre of the rug between shots. (01:01:00)
Boo! Humbug - S1-E5
Continuity mistake: When the silly string fight happens, you see Nixon's can run out of string and he puts it back on the table when he takes off his mask. But when Will and Grace run back to grab the jaw-breaker, the can is suddenly full again as Will shoots Grace with it. (01:01:00)
Boo! Humbug - S1-E5
Continuity mistake: At the end of the episode, "Buzzy Wuzzy" takes her bee mask with her and they leave. But when Will and Grace dive for the jawbreaker, the bee mask is back on the coffee table. (01:01:25)
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)
Continuity mistake: The amount of frothy foam on top of the protein shake differs through consecutive shots, as Grace is about to drink it, and after she has taken a sip and as Will and she talk in the kitchen area. (00:20:55)
Continuity mistake: When Grace sits on the sofa (before Jack enters) her black bag is on the table in front of her. When Jack enters, wearing the alien costume, the bag is suddenly on the floor. Then when Jack gets up to leave the bag has moved itself back onto the table. (00:22:20 - 00:23:40)
Continuity mistake: When Jack lets slip about Will's affair with Steven to Grace, he throws a blue tassel to the floor, and bends over so Grace can kiss his butt. But when he stands up he puts a purple tassel back on the table. (00:28:15)
Continuity mistake: When Jack finds out that Grace doesn't know who Steven is, he picks up a blue tassel - twice between shots. (00:28:15)
Continuity mistake: When Grace gets out all the videos which hint Will's 'secret', she puts the bag on the table, but in the next shot it's in her hand. Between these same shots a sticker also appears on one of the video cases. (00:29:50)
Where There's a Will There's No Way - S1-E7
Continuity mistake: The bites in Graces chocolate donut change. (01:05:35)
Where There's a Will There's No Way - S1-E7
Continuity mistake: Grace puts her chocolate donut down on her pad. It then vanishes, then reappears. (01:06:05)
Where There's a Will There's No Way - S1-E7
Continuity mistake: When Grace is cleaning the table with the playing cards on it, all the cards are separated in piles on the table, but in the next shot they're all in one big messy pile. Grace holds a small piles of cards, and never touches the big messy pile, then in the next shot she picks somehow up all the remaining cards in one neat pile. (01:21:05)
Continuity mistake: When Karen is sitting at the desk, with a fistful of pencils, the pencils often change position in her hand. (00:01:40)
Continuity mistake: When Will is sorting his CD's, Grace enters the flat and puts her bag on the sofa with the back facing out and it is all black. When Will gives Grace a glass of wine, the front of the bag is facing out, with the flower design. (00:05:10)
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)
Continuity mistake: When Grace is putting on the waterworks in front of the landlord, to get a lower cut on the apartment, the bowl of tassels on the table is repeatedly full/half full, and tassels jump in and out of the bowl. (00:16:00)
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen