Liam Hall

Slade (recurring guest star MANU BENNETT) returns and asks Oliver for help in tracking down his son. When they learn Joe (guest star WILLIAM FRANKLYN-MILLER) 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.

The past comes back to haunt both Oliver and Laurel. Curtis is upset when he discovers that Diggle and Lyla have restarted The Ghost Initiative with Diaz, China White (recurring guest star KELLY HU), Kane Wolfman (guest star LIAM HALL) and Carrie Cutter (recurring guest star AMY GUMENICK). Series star David Ramsey directs his first episode of Arrow.