Shelter from the Storm - S3-E18
Continuity mistake: When Winn and Brainy hug, Winn starts the hug with one arm high and one lower, towards Brainy's waist. The shot cuts and both his arms are up and in the centre of his body.
Revealing mistake: Childen is getting beaten up in his hotel room by a thug, and if you watch the very last punch thrown before the scene changes, you can see that the actor really pulls his punch hard. It doesn't even come close to hitting Childen. (00:40:14)
Continuity mistake: When the paramedic examines Foggy he places the stethoscope around his neck with the chest piece hanging to his left, but when it cuts to the view from inside the ambulance the stethoscope's suddenly hanging around his neck the opposite way. (00:17:30)