Continuity mistake: In one scene, Claire Underwood is returning to the White House from Iowa. In the hallway leading to her bedroom's stairs, she is followed by a black female Secret Service agent, obviously part of her entourage, who stops to stand guard at the beginning of the stairs. In another scene 30 minutes later, that same agent is seen standing guard at the entry of the campaigning house in which Frank Underwood is going to say his victory speech. But Claire has not flown from Washington to Iowa, so the agent should not be there. (00:15:15 - 00:45:30)
Continuity mistake: While the first lady and secretary are playing beer pong, the secretary makes the first shot of the scene. After the first lady drinks the beer, you see two glasses in front of her and the one on the left has a ping pong ball in it already. The first lady takes her shot and misses, so the secretary goes again and makes it in the same glass we saw earlier that already had a ball in it. (00:37:00 - 00:38:00)
Continuity mistake: When Frank orders Peter to take off his clothes and get into the bathtub, he starts to unbutton the shirt putting the hand on the stomach at the end of the shot, but in the next one he's still seen in the mirror's reflection with the hand on the collar side. (00:46:35)
Continuity mistake: When Frank proceeds to interact with the spider caught in a drinking glass, a number of items have disappeared: a) Dark towel hanging on the refrigerator door. B) Power cord going behind the refrigerator. C) Bottle on right side of middle window. In addition, the two bottles on the floor near the refrigerator were moved a little and were switched (pay attention to the yellow collar ring). (00:48:00 - 00:49:00)
Continuity mistake: In the previous episode, Doug Stamper breaks his Blackberry after deleting Rachel and orders a new phone right away. Gavin Orsay (the technical guy) sees on his computer that there was a last message on September 30th 2014 at 9:22:22 and a lost of signal at 9:22:39. In this episode he uses the new Blackberry as he is receiving a text message from Rachel Posner: "It's done" on Saturday September 4th 2014 at 8:09, 26 days earlier than he destroyed his old phone. Bonus: September 4th 2014 wasn't even on a Saturday but a Thursday. (00:24:30 - 00:37:45)
Continuity mistake: When Frank and Gene Clancy are at Oren Chase's house, Oren ends the conversation by taking a sip of his ice tea. When he first grabs the glass, he grabs it by the top. In the next shot, he's holding it by the middle. And in the following shot, he's holding it at the top again.