Slade returns and asks Oliver for help in tracking down his son. When they learn Joe has been taken hostage by mercenaries, their mission to save him gets complicated by a terrible revelation that could shatter Slade's hopes of reunion forever. Meanwhile, Vigilante reappears in Star City.
Elenco: Stephen Amell , David Ramsey , Katie Cassidy , Willa Holland , Paul Blackthorne , Emily Bett Rickards , Echo Kellum , Colton Haynes , Rick Gonzalez , Juliana Harkavy , John Barrowman , Susanna Thompson , Manu Bennett , Colin Donnell , Josh Segarra , Sea Shimooka , Ben Lewis , LaMonica Garrett , Katherine McNamara , Joseph David-Jones , Stephen Amell , Summer Glau , Susanna Thompson , Sussana Thompson , Willa Holland .