Visible crew/equipment: When Rory comes out during the party to meet Dean, he says, "I don't belong here, not anymore, do I?" then as he says, "You look good," a boom mic drops over his head. (00:39:20)
Visible crew/equipment: After Emily asks Lorelai to help her with dating etiquette, when Lorelai and Rory leave the house some filming equipment is visible at the top left side of the screen. (00:20:20)
Visible crew/equipment: When Lorelai and Christopher are at the Dragonfly looking at the lunch menu, filming equipment (looks like the second camera) is visible at the left side of the screen, and it's visible again when Lorelai describes Michel and the bathrobe bandits. (00:22:15)
Visible crew/equipment: When Loralie walks out of the kitchen with a bowl of popcorn you can see the camera is slightly covered on the left side of the screen. (00:49:53)
Visible crew/equipment: During the Dragonfly's staff meeting, when Michel stands up and announces, "We have a problem with some honor bar discrepancies," the T-mark is visible on the floor between Michel and Lorelai. (00:06:30)
Visible crew/equipment: When Emily enters the diner and says hello to Luke, two yellow T-marks are taped to the floor, then when she approaches the counter the actor's blue tape mark is visible at Luke's feet, and as Luke walks to the coffeemaker another tape mark becomes visible. (00:40:20)
Visible crew/equipment: At the start, Lorelai brings home the bags of assorted tacos, and when Lorelai stands at the counter pouring coffee, we can see the red T-mark taped to the floor where she's standing. (00:00:50)
Visible crew/equipment: In Logan's apartment, when Lanny is telling Logan that Cassandra called, an orange T mark is visible on the carpet to the right of Rory. (00:05:01)
Visible crew/equipment: After Luke admonishes Sookie and takes the ladle away from her, when it cuts to Logan's dining room we can see the crew's mat with blue gaffer tape at the bottom left corner of the screen. (00:26:25)
How Many Kropogs to Cape Cod? - S5-E20
Visible crew/equipment: When Emily notices her sewing box is missing and picks up the replacement there is a mic in the top right corner. (00:34:35)
Blame Booze and Melville - S5-E21
Visible crew/equipment: When Sookie and Jackson rush out of their house because Sookie's in labor, just as Rory tells Lorelai that they should have thrown the baby shower earlier, we can see the reflection of the boom pole and microphone on the hood of the van. (00:12:35)
A House Is Not a Home - S5-E22
Visible crew/equipment: When Mrs. Kim calls Gill over to look at his van, he tells her it's not big enough for a tour van, and two tape marks are visible on the ground - one where Lane stands and one where Mrs. Kim stands. (00:37:05)
Fight Face - S6-E2
Visible crew/equipment: After TJ has put up the three wood shelves at the diner, when he tells Luke that the top shelf is an engagement gift just as he walks around the counter, the white T-mark is visible on the floor where TJ had been standing. (00:05:45)
Fight Face - S6-E2
Visible crew/equipment: When George, the architect, starts walking out of the diner, the T-mark (looks like chalk) is visible on the floor beside Luke's chair. (00:28:45)
Visible crew/equipment: After Paris leaves the inn, when Lorelai goes into the kitchen and teases Michel and Sookie for hiding, the T-mark is visible at Lorelai's feet. (00:09:20)
Visible crew/equipment: When Paris calls Rory while she's at the DAR office with Emily, in the shot of Paris as she walks away from the coffee cart toward the bench, a yellow tape mark is visible on the ground in front of the bench where Paris will sit. (00:13:40)
Visible crew/equipment: After TJ gives Tom the "special" hammer, when TJ walks over to Rory's bedroom door the white T-mark is visible on the floor under the table. (00:17:15)
Visible crew/equipment: At the DAR event, after Emily finally tells off Mrs. Huntzberger, when Emily takes her seat the white T-mark is visible on the floor near her chair. (00:42:20)
Visible crew/equipment: As Richard and Mitchum have their heated discussion in the bathroom, there is a mic seen through the whole scene in the top right corner that moves as the camera moves.
Welcome to the Dollhouse - S6-E6
Visible crew/equipment: When Lorelei calls Taylor and she's on the bed with Paul you can hear someone from the crew snap at the dog to get his attention.
Chosen answer: Lorelai and Christopher get married impulsively in Paris but they get divorced shortly after returning home. I don't know the exact number of days or weeks but they definitely weren't married for more than a couple of months.