'Once Upon a Time'
Actress Jennifer Morrison and actor Robert Carlyle who plays both Rumplestiltskin and Mr. Gold, on the new series "Once Upon A Time" speak during a panel session at the ABC Summer TCA Press Tour in Beverly Hills , California August 7, 2011. Reuters/Fred Prouser

New details about “Once Upon a Time” Season 5 episode 12 have surfaced online. The report reveals that Mr. Gold will also play a role in the rescue attempt, while the heroes are in the Underworld.

[Spoiler alert]

According to a report by TV Line, the heroes will spread out after arriving in the Underworld and start searching for Hook (Colin O’Donoghue). The heroes will find that Underworld is a “topsy-turvy” version of Storybrooke.

Snow White (Ginnifer Goodwin) will be responsible for searching Granny’s diner. Snow White will find a “skeletal line cook” and the Blind Witch (Emma Caulfield) inside the diner. The Blind Witch is apparently the owner of the establishment.

The Blind Witch will find out about the heroes’ mission after chatting with Snow White. The heroes appear to be heading nowhere with their search and later Mr. Gold (Robert Carlyle) will announce his role in the search. It is not clear if the character is volunteering his services or if he will make a deal in exchange for his services.

Regina (Lana Parrilla) will be reunited with her mother in the next episode of “Once Upon a time” Season 5. Regina’s mother is reportedly the Mayor of the town in Underworld. The heroes will also find many people from their past in the Underworld. Each soul is there because he/she is holding onto a past grudge.

The heroes will be in a position to save some of the souls in the Underworld. However, they will be hindered at every turn by their new antagonist Hades (Greg Germann).

Meanwhile, writer and Executive Producer Adam Horowitz announced on Twitter that the show has been renewed for Season 6 by ABC. Horowitz thanked ABC and also the “most extraordinary fans” for their support.

“Once Upon a Time” Season 5 episode 12 airs on March 6. According to the official synopsis of the episode, the heroes will find that rescuing Hook is more difficult than what they had anticipated.