In the latest trailer for "Blood Debts," the "Arrow" midseason premiere, Oliver promises to kill Damien Darhk for what he's done to Felicity. The extended promo reveals Donna Smoak's reaction to Felicity's prognosis and shows Darhk promising his wife a new beginning -- but only after this world has fallen.

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