Meet the cast of Ripper Street series four

Who does he play?

Assistant Commissioner Augustus Dove. He’s responsible for increased funding and positive press coverage for H Division.

Although young for his position of responsibility, Dove is held in esteem by Reid, while Drake is happy to follow his zeal and ambition.

Matthew Lewis

Who does he play?

Desk Sergeant Samuel Drummond. Lewis’s role as 'Drum' is a far cry from that of Neville Longbottom in the Harry Potter films – for one he now has a moustache.

He is to H Division what Q is to James Bond, with a meticulous approach to building a case based on information, logic and science – although his methods don’t go down too well with some of the old guard.