Whitechapel

The Organised Crime Division seems to have control of London's streets until a spate of gruesome killings and maimings rocks Whitechapel. Buchan claims the crimes replicate those committed by the infamous Kray twins back in the 1960s. He tells Chandler the victims are chosen from those who gave evidence against the Krays and that they are killed in the manner of their testimony.

A frustrated Miles informs Chandler that the copycat killer has struck again, as a man is shot in a former Kray haunt. A barmaid offers up a name - Jimmy Kray. The team are stunned when Jimmy's mother reveals a former relationship with Ronnie Kray, which resulted in identical twins - Jimmy & Johnny. The team find the twins are genuine criminals when a meeting with them turns into a shoot out.

Chandler challenges Jimmy to a boxing match in order to obtain his DNA and with Buchan deftly stealing Ronnie's DNA from an old envelope, they attempt to see if the twins really are Ronnie's sons as their mother claims them to be. Will the DNA prove the twins are real successors to Ronnie, and will Chandler finally get his man?