Teale's character Philip Osborne has been on the show since series 1, when he was Chief Inspector and removed DS Arnott from the Counter Terrorism unit for refusing to take part in a cover up. At some point between series 3 and 6, Osborne was appointed Chief Constable of Central Police, the position he will hold in this newest series — not a great omen for Arnott and AC-12.
Image Source: BBC Pictures