Its a hard one to take, but the final moments of Haunted see Diggle finding out the truth about his brother. Whether this is really the case, for now at least its been revealed that Diggs brother Andy was a no-good sort who was a criminal competitor of Darhk and H.I.V.E.s. Since the first season, weve seen Diggle plagued by the death of his brother, with him first targeting Deadshot to then finding out that H.I.V.E. was behind Andys death. Now he knows why, and it remains to be seen how this will affect Digg going forward.