Continuity mistake: After the officers show up in Kim's office regarding the kidnapping, in the closeup one of them uses his left hand to contact Control via his shoulder mic, but in the next wideshot it's his right hand up at the radio mic.
Continuity mistake: In the pilot, when Deb wakes up in Jane's body in the ER and notices her reflection she puts her left hand up to her new face, but in the closeup of her reflection it's not reversed as it should be. This mistake is visible in the opening shots of every episode for the duration of the series.