Continuity mistake: When Clara asks the "girl" coming down the stairs if she's a friend of Angie's, and the "girl" replies in a monotone, in the shot facing Clara the girl-robot is seen nearly at the bottom of the steps, but in the next shot facing the "girl", she's suddenly higher up the stairs. (00:12:05)skater49th
Continuity mistake: While Clara shouts, "I don't know where I am," over and over, the Doctor sonics his way into the house. When he kneels beside Clara, then notices the 'girl' on the stairs and stands up, in the shots facing him we can see that the young actress stands on the step facing the stairway (note her legs), with her hand at her side, but in the shots facing the girl she stands facing the door with her hand on the banister. (00:14:20)Super Grover
Continuity mistake: When Clara is asleep in bed after the Doctor prevented her from being downloaded by the people in the Shard, he sets up a vase of flowers, a glass of water and a plate of Jammie Dodgers on her bedside table. The positions of the glass, the cookies on the plate, and the torn-open package the cookies came out of is seen when the Doctor leaves a half-eaten cookie on the plate in a close-up. When Clara wakes up, however, the cookies on the plate, the packaging and the glass have all changed positions. (00:18:20)skater49th
Continuity mistake: While the Doctor and Clara are talking and realise that she now possesses extensive computing knowledge, in shots facing the Doctor he has his hands raised in various gestures or by his mouth, but his hands aren't visible in shots facing Clara. (00:22:15)skater49th
Continuity mistake: When Clara and the Doctor watch the lights going out, they first stand in front of the chair, but when the Doctor notes that some planes have WiFi, they stand behind the chair. That chair switches from in front of them to behind them another couple of times. (00:24:00)Super Grover
Continuity mistake: Miss Kizlet wears a large silver brooch on her suit's right lapel in every shot of her, but after Clara notices the lights going out behind her house, when it cuts back to the office Kizlet's brooch switches to her left lapel just before it cuts back to the Doctor and Clara, and since the brooch has a distinctive design we can tell that it's a flipped shot. (00:24:10)Super Grover
Continuity mistake: When the Doctor and Clara are on the rooftop terrace, there's a distinctive design on the Doctor's bow tie, but when he's in the coffee shop the bow tie's design differs, and when he runs outside to ask if Clara's okay it changes back, then it changes again when he's in back the shop. Additionally, when the walking base station Doctor uploads Clara it's wearing a bow tie, and its design also changes on the motorbike and in Kizlet's office.Super Grover
Continuity mistake: When the Doctor and Clara are sitting at their table on the balcony, talking, the level of Clara's mostly-finished milkshake changes several times, most noticeably when she and the Doctor are arguing over who is going to use her computer to hack the bad guys' systems.
Continuity mistake: When the Doctor and Clara, while seated at their table on the balcony, are arguing over who has the better hacking skills while pulling her computer back and forth, in overhead shots their table is somewhere in the middle of the balcony. This contrasts with all other shots, which show their table right next to the railing.