The Return

"Slade. I told myself I wasn't going to come down here. That I never needed to see you again. You'll be happy to know I was wrong. You think I won't get out of here? You think I won't kill those you care for? Well, I keep my promises, kid. I keep my promises!"

- Oliver Queen and Slade Wilson

Synopsis
Malcolm puts Oliver and Thea in a dangerous situation that lands them on Lian Yu with Oliver's former enemy, Deathstroke. A flashback reveals when Oliver and Maseo returned to Starling City to retrieve the Omega bioweapon, and despite being under strict orders from Amanda Waller not to reveal himself to anyone, Oliver looks in on his family, Laurel, and Tommy.

Protagonists

 * Oliver Queen
 * Laurel Lance
 * Thea Queen
 * Malcolm Merlyn
 * Quentin Lance
 * Tommy Merlyn
 * Maseo Yamashiro

Antagonists

 * Mockingbird (Amanda Waller)
 * China White (Chien Na Wei)
 * Captain Boomerang (Digger Harkness)
 * Jordan Kern
 * Matthew Shrieve
 * Peter Kang
 * Ra's al Ghul
 * Slade Wilson

Other Characters

 * Andy Diggle
 * Felicity Smoak
 * Frank
 * John Diggle
 * Lucas Hilton
 * Moira Queen
 * Robert Queen
 * Sara Lance
 * Shado
 * Taiana Venediktov
 * Yao Fei Gulong

Teams and Organizations

 * A.R.G.U.S.
 * League of Assassins
 * SCPD
 * Starling City Rockets
 * United States Military
 * Weathersby Posner

Species

 * Humans

Objects and Concepts

 * Alpha-Omega
 * Alpha
 * Omega
 * Oliver Queen's Bow and Arrow
 * The List

Locations

 * Earth-1
 * Earth
 * China
 * Corto Maltese
 * Hong Kong
 * Lian Yu
 * A.R.G.U.S. Maximum Security Prison
 * Nanda Parbat
 * United States of America
 * San Francisco
 * Washington
 * Starling City
 * Thea Queen's Loft
 * Queen Mansion