Law and Order: UK: Honour Bound

DS Ronnie Brooks agrees to help his old friend and partner DS Jimmy Valentine in an undercover drugs sting, but tragedy strikes when an innocent bystander is shot dead. As both Internal Affairs and the CPS investigate the shooting, they are forced to turn their spotlight on Brooks. As the case proceeds, a murky episode from Brooks's past comes to light, but when he refuses to comment or testify, James Steel and Alesha Phillips realise that they must find another way to prove their case.