VIDEO: Sneak Peek "Selfless, Brave and True" on ABC's ONCE UPON A TIME

On the next episode of ABC's Once Upon a Time titled  "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.

The episode airs Sunday, March 24th on ABC. Check out the clips below!