Factual error: When Debra Messing and Dermot Mulroney 1st arrive in London Debra goes to a pub to change her outfit, the shot showing the outside of the pub you can see an American style traffic lights eg walk, don't walk which are nothing like the English green man red man traffic lights.

Continuity: In the scene where Debra Messing and Dermot Mulroney first arrive in London at the first party, Debra's jacket belt is undone when they enter through the door, then done up tightly when they are shot from a different angle, and undone again as those move from the room.

Continuity: When Dermot is drying off in the bathroom, he is holding the towel in his left hand and by his side, but in the shot of Debra he is holding the towel at his chest. Then cut back to Dermot and he is holding it by his side again.

Continuity: During the "shower scene" when Dermot comes out naked and Debra looks away with her hand on her mouth, her hands keeps changing places. Facing her, she puts her hand on her mouth, but in a side shot, she has her hand over her eyes. Then when facing her, she has her hand over her mouth again.

Other: Seems pretty unlikely that even though Kat was sober enough to remember the pin numbers to all her credit cards when drawing out all her money, she apparently was too drunk to remember having sex. Surely her body would know if not her mind.

Continuity: When Debra and Dermot get to the big house and go into the room with the big bed, Debra walks into the room and her dress is hanging off one shoulder. Then when the back shot, her dress is off both shoulders.

Continuity: Just prior to the wedding (near the end), when Debra and Dermot are outside the church standing beneath the arbor, she is holding her floral bouquet. When they enter the church, the bouquet is gone; Once she's walking down the aisle, the bouquet reappears.

Continuity: When Debra and Dermot are first on the plane flying to London, her hand is over the chair. In the next shot, she is holding a champagne glass.

Other: In the scene where Debra Messing is withdrawing money from the cash machine, after the girls night out, the machine states a maximum withdraw amount of £250. However, when she draws the cash you can see that there are only £20 notes in her hand which cannot amount to £250. She most certainely would have opted for the maximum amount each time as she makes several withdrawals to obtain the amount of money she needs.

Continuity: When they are going to bed for the first night and Debra is putting pillows between the two of them, a pillow near both of their heads changes. In one shot, it has lavender ribbons. In the next shot there are no ribbons and it's a different color.

Continuity: In the scene where Debra Messing gets cash from the cash machine (during the bachelorette party), she leaves her purse on the machine and gets back in the limo. The next morning, her purse is magically back on her bed.