Visible crew/equipment: At the beginning when Sarah, John, Cameron and Derek are driving past the dead cows, the shadow of a camera can be seen on the inside of the passenger door that Sarah is sitting in.
Visible crew/equipment: When Arthur goes to Dragoon to ask for help, when Dragoon runs out of the hut to turn back into Merlin, on the left hand side of the screen you can see a camera crew in modern clothes. [Fixed in Netflix version]. (00:23:00)
Suggested correction: I don't see any crew. I'm watching it on Netflix. Perhaps they fixed or perhaps they edited it out after realizing the mistake. But they aren't there anymore.
Even if Netflix corrected the mistake doesn't mean the mistake is now invalid if the mistake existed in the original BBC One airing. Netflix is known to change or edit programs they stream (such as replacing soundtrack songs).
Visible crew/equipment: In the beginning of the episode a crew member can be seen with a camera stand, modern clothes and a white helmet for a couple seconds. He is behind Kahlan and Richard.