The Red Door - S2-E9
Continuity mistake: When Big Jim communicates to the military commander at the dome, he writes on his notepad, and shows "Me and my son" to the commander; yet when he returns to his car and looks at it again, it's written quite differently. (00:24:05 - 00:24:45)
Continuity mistake: When Daisy is hugging Jemma after proving they're both human, Daisy's right arm is hooked entirely around Jemma's neck. There's an angle change and a lens flare (possibly to help cover the cut) and Daisy's right arm is now at 90°, with her hand on Jemma's left shoulder. (00:21:15)