Season 5 of Arrow comes to an end with “Lian Yu.” That is, of course, the place Oliver allegedly spent his “five years in hell…” when he wasn’t in Hong Kong or Russia. It also later became Oliver’s personal super-prison, holding Deathstroke Slade Wilson and Captain Boomerang Digger Harkness. In the comics, Lian is the name of Roy Harper’s daughter, sort of Oliver’s granddaughter, who died an utterly pointless tragic death that angered many fans.