Photo Flash: First Look - This Week's New Episode of ONCE UPON A TIME

On this week's all new episode of 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 fiance, 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 SUNDAY, MARCH 24 (8:00-9:00 p.m., ET) on ABC.

Check out a first look below!

Photos by: ABC/Jack Rowand

Tzi Ma

Eion Bailey

Tzi Ma, Eion Bailey

Eion Bailey

Tzi Ma

Sonequa Martin-Green

Jennifer Morrison

Michael Raymond-JAMES, Sonequa Martin-Green

Michael Raymond-JAMES, Sonequa Martin-Green