Your Father. My Friend (S03E04)

As a lost girl wanders the dangerous streets of the East End alone, Detective Inspector Drake must try to find his old friend Edmund Reid and bring those responsible to justice. While there are still questions to answer about the death of Horace Buckley, the team of H Division unites to locate the girl. When tangible proof to finally bring Capshaw to justice arrives, attempts to arrest him deliver devastating consequences. (BBC)