Luther Gillis: File #521 - S4-E2
Continuity mistake: When Luther riles Tanaka up, at the beginning a cop with a yellow shirt and one with a black patterned one are in the background. First the yellow one, then the black one in separate shots move past the desk and exit stage left carrying a folder. A policewoman then does the same. In the second part of the scene all these people make their exit to the left again. (00:08:30)