Episode #1.4 - S1-E4
Continuity mistake: Mr. Knightley has just confessed his love for Emma. She is about to kiss him and is holding his face with both of her hands. Her left index finger moves from being right on his ear to being behind it and further down on top of his hair. (00:48:40)
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.
Other mistake: Curtis grabs Alisha's hand without activating her power. (00:16:45)