When Yaz looks in Daniel Barton's file there is a photo paperclipped to the left hand side but a second later the photo has been replaced by a business card and some newspaper clippings.
The Doctor & Graham walk towards O's house, leaving him behind them but immediately afterwards O is inside pouring tea while they are looking around, clearly having just entered from the way they are looking about.
When the fam is in the agent's car being driven by that invisible thing. The Doctor slams the breaks on just as they were going to plummet backwards off the construction zone of the highway, she hits two cones and they get wedged under the bumper. The next continuous shot shows the cones back in their standing positions.
Graham is surprised when O tells him the Doctor had previously been a man, noting he thought she was joking about that. However, earlier C mistook Graham for the Doctor, stating the Doctor was a man while shaking Graham's hand.