Things Aren't Simple Anymore - S6-E6
Visible crew/equipment: While the song The end of the line is playing and as the credits appear on screen look at the back window of the Meldrews car, you can see the helicopter used for the high up scenes reflected in the glass.
The Executioner's Song - S6-E1
Other mistake: The lady opposite wants to watch the large TV through the Meldrews' window, but when you see the windows, they are frosted and it would be impossible for her to see the TV. (00:16:30)
Chosen answer: The episode is 'The Pit and the Pendulum' The first episode of series 4.
James Ransford ★