Tim Piggot-Smith was Chief Constable John Stafford in series 1, 2 and the first 2 episodes of series 3. Martin Shaw's Alan Cade was assisting Stafford in the initial episodes of series 3 before being awarded the Chief's job following Stafford's promotion to a job with Europol.
Chief Constable Alan Cade:
My arse belongs on the bonfire! I don't want to sit with you! I'm in the arena, fighting for freedom of expression, right of assembly, access to information, all the things that you people are chipping away at. I'm not doing this out of caprice, I'm...