Arrow
Season 4 Episode 13: “Sins Of The Father”
Directed by Gordon Verheul
Written by Ben Sokolowski & Keto Shimizu
Created by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg
Starring Stephen Amell, Katie Cassidy, David Ramsey, Willa Holland, Emily Bett Rickards, John Barrowman, Paul Blackthorne
The CW
Air Date: Wednesday, February 10th, 2016, 8:00pm

Last week on Arrow, Roy Harper (Colton Haynes) came back, but he was changed, being controlled by a new player called the Calculator (guest star Tom Amandes). The gang is able to save Roy, and Felicity (Emily Bett Rickards) is able to go head to head with a familiar foe. Thea (Willa Holland) is dying, her fatal wound caused by Ra’s al Ghul, has mysteriously opened. Nyssa (Katrina Law) finds the lotus, a magical elixir that can restore Thea. Who did she get it from? Another familiar face – Tatsu (Rila Fukushima). Nyssa wants Oliver (Stephen Amell) to kill Malcolm Merlyn (John Barrowman). In return she will give the cure o him for Thea.

Spoilers below.