The CW has released an official description for “Unfinished Business” which is the Thursday, April 26 episode of Supernatural.
You can find the write-up with new spoilers below.
DIRECTED BY AND GUEST STARRING RICHARD SPEIGHT, JR – Gabriel (guest star Richard Speight, Jr.) is back and drags Sam (Jared Padalecki) and Dean (Jensen Ackles) into his plot for revenge on the demigods who sold him to Asmodeus. Meanwhile, Jack’s (Alexander Calvert) inflating confidence leads to reckless decisions that could put others in harm’s way. Richard Speight, Jr. directed the episode written by Meredith Glynn (#1320). Original airdate 4/26/2018.
UPDATE: We now have some preview images with some well-loved familiar faces! Enjoy: