Ř1, D5: After Detective Lance arrests Oliver for murder, Oliver tells Moira that the only lawyer he'll allow to represent him is Laurel. Laurel takes the case, which puts her at odds with her father. Oliver offers to take a polygraph in front Detective Lance, but things get tense when Lance asks him if anyone else was on the island with him. Oliver flashes back to the island, when he got his first scar, courtesy of DC villain Deathstroke (guest star JEFFREY ROBINSON).