In the midseason finale of "Arrow," Felicity suffered some critical injuries following an attack ordered on Oliver by Damien Darhk. Now, in "The Aftermath," Oliver will stop at nothing to get back at Darhk.

Oliver Swears His Revenge In New "Arrow" Midseason Return Promo

"Blood Debts" -- (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

THE AFTERMATH - Oliver (Stephen Amell) must deal with the devastating consequences of Darhk's (guest star Neal McDonough) last attack. Seeking revenge, Oliver goes on a brutal manhunt looking for Dahrk. Jesse Warn directed the episode written by Oscar Balderrama & Sarah Tarkoff (#410). Original airdate 1/20/2016.

Starring Stephen Amell, Neal McDonough, David Ramsey and Emily Bett Rickards, "Arrow" returns to The CW on Wednesday, January 20 at 8/7C.