For the issue of the same name, see Sins of the Father (issue).
"There will be war, and the streets of your home will flow red with the blood of our enemies, whoever they may be."
Nyssa al Ghul to Laurel Lance.
"Sins of the Father" is the thirteenth episode of the fourth season of Arrow, and the eighty-second episode overall. It aired on February 10, 2016.


Oliver receives an offer from Nyssa that is hard to refuse. Meanwhile, Thea continues to battle the blood lust, and Malcolm steps in to help his daughter. Laurel has a heart to heart talk with Nyssa.[1]


Malcolm reveals to Oliver that he knows about William.

Oliver asks Felicity to marry him again, this time asking why were they waiting.

Malcolm calls Damian Darhk and gives him information about Oliver. He tells him that Felicity isn't who Oliver cares about above all else, but his son William.




Preparation ran from November 23 until December 3, 2015. Shooting ran from December 4 until December 15, 2015.[citation needed]




  1. ARROW Season 4, Episode 13 Description; "Sins Of The Father" - Comic Book Movie