Every Day a Little Death - S1-E12
Continuity mistake: When Edie gets the phone call, saying Mrs Huber was found, while she is at Mike's, you can see the cell phone on the table where she is sitting. When the phone rings, she reaches to nowhere with her right hand and you can still see the phone. Then the view changes and you can see her getting the call with her left hand.
You Could Drive a Person Crazy - S2-E2
Continuity mistake: When Susan is screaming at Edie and she's going away, Susan's hands change position between shots.
Continuity mistake: Lynette goes to her second interview and has to take her daughter with her. When she is talking to Stu the receptionist he is eating a long sandwich. In the initial shots the sandwich is whole, but by the final cut away the sandwich has been cut in half lengthways, with the second half now on the desk in front of him.
Continuity mistake: During the dinner scene at the Van der Kamp's home, Danielle throws her plate against a wall, but when they pan back to her, the plate is still on the dinner table.
Like It Was - S3-E4
Continuity mistake: When we see a close up of Orson making a cup of Cappuccino, you can see the cup is filled with steamed-milk foam, but as the scene changes there is less foam in the cup than there was in the previous shot.
Mother Said - S4-E15
Continuity mistake: When Tom tells Lynette that Kayla is frightened of her because she hit her, the bedroom door behind him closes slightly between shots.
Continuity mistake: After Gabby throws John out of the hotel room, she locks the door. But when Carlos leaves the room, he opens the door without having to unlock it.
Chosen answer: Poker. They have been playing that this whole time, once a week with everyone who was invited that lived on the Lane.