Read a description of Sunday’s Once Upon a Time episode “Selfless, Brave and True,” and see the set of promotional images released by ABC.

August (Eion Bailey) returns this week for a big flashback episode, and as we learn in the press release from ABC, he’s still in Storybrooke!

Read what else has been revealed about “Selfless, Brave and True”:

MARY MARGARET DISCOVERS THAT AUGUST HAS BEEN HIDING AWAY FROM THE OTHERS AND IS COMPLETELY MADE OUT OF WOOD, AND EMMA IS SHOCKED WHEN NEAL INVITES HIS FIANCÉE, TAMARA, TO COME TO STORYBROOKE, ON ABC’S “ONCE UPON A TIME”

Eion Bailey Guest Stars as August

“Selfless, Brave and True” – While Mary Margaret goes off on her own in an attempt to come to grips with what she did to Cora and how her deed has affected her, she stumbles upon August, who has hidden himself away from the others and is completely made of wood — ashamed at the actions he has taken in life; and Emma is shocked when Neal invites his fiancée, Tamara, to come to Storybrooke. Meanwhile, before the curse was cast, August is introduced to a man of magic who may be able to prevent him from turning back into wood — but at a steep price — on “Once Upon a Time,” SUNDAY, MARCH 24 (8:00-9:00 p.m., ET) on the ABC Television Network.

Guest starring are Tony Amendola as Geppetto/Marco, Keegan Connor Tracy as Mother Superior/Blue Fairy, Michael Raymond-James as Neal Cassidy, Eion Bailey as August W. Booth, Ethan Embry as Greg Mendell, Sonequa Martin-Green as Tamara, Dianne Doan as Isra, Peter Kawasaki as orderly, Rick Tae as doctor, Manny Jacinto as Quon, Tzi Ma as The Dragon and Jakob Davies as Pinocchio.

“Selfless, Brave and True” was written by Robert Hull & Kalinda Vazquez and directed by Ralph Hemecker.

The set of official stills from the episode has also been released:

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It looks like a real-world flashback this time! Are you excited to see August back on Once Upon a Time, and to find out what he’s been up to since arriving in our world as a child?

Once Upon a Time 2×18 “Selfless, Brave and True” airs Sunday at 8/7c on ABC.