At 6:30, after Sarah has been cutting up the chicken and Chuck leaves the room, while she starts looking for the glasses in the apartment, she spots a photo of her and Chuck. The picture she reaches for is different from the close-up picture that she ultimately views.
When breaking into the government building, there is a close-up of Sarah's shoes, high-heeled boots. About a minute later, she is seen running through the hallway with flat-soled boots on. It switches back to high-heel later in the scene.
When Ellie calls Casey just after she crashed her car, she has red nail polish in the wide shots, but not in the closeups.
Sarah still has the Intersect in her head, since she was never offered the suppression device in the previous episode. This means that she should have flashed on Chuck's pictures in their home and realized he was telling her the truth, while Quinn was using her.