- Season 4 Episode 20
DIGGLE IS CONSUMED WITH GUILT AND SEEKS REVENGE
As Oliver (Stephen Amell) and Felicity (Emily Bett Rickards) look for a magical solution to defeat Darhk (guest star Neal McDonough), a vengeance-driven Diggle (David Ramsey) gets a lead on Andy’s (guest star Eugene Byrd) whereabouts and heads off to confront his brother. Meanwhile, Alex (guest star Parker Young) takes Thea (Willa Holland) on a vacation that quickly turns into a nightmare.
Promo Video #1
See more at Arrow Season 4 Episode 20 "Genesis" Promo