Visible crew/equipment: When Number 2 and Number 6 are talking at the beach there is a shot of Nadia getting into the sea. Just before she takes her sunglasses off you can see rows of spotlights reflected in them. This is because the scene was shot in a studio and not a real beach. (00:15:25)
Visible crew/equipment: In Number 2's chamber Number 6 refuses his offer and says "You won't hold me" as he turns around and goes to walk out. If you look at the bottom right of the screen you can see the shadow of the boom microphone cast on the floor. (00:15:20)
Chosen answer: We're led to believe Rover is some kind of robot in the series. According to books on the show, Patrick McGoohan was looking for an unusual guardian for the Village, looked up at the sky, and saw a weather balloon, which was what Rover was.
Captain Defenestrator