The Promise - S3-E11
Visible crew/equipment: Once the ledge rescue is over, after Johnny tells Brackett that he could put in a good word for him to join the paramedic program, when Roy opens the squad door to get in, the wing mirror offers up nice reflections of a few crew members.
Revealing mistake: When Fierro's hawk lands on the boy's arm, we can see the protective gear wrapped around the boy's arm under his sleeve. (00:06:10)