'Once Upon A Time' Mide-Season Premiere News & Update: Heroes to Face Souls of the Underworld to Save Hook [Spoilers]

On the 100^th episode of "Once Upon a Time's" 5^th Season, NBC teased their fans with a major nostalgia by revealing photos of the family reunion. The midseason premiere, titled "Souls of the Departed," will get the stars rescue Hook.

 The #OUAT heroes make it to the Underworld but does everyone return to Storybrooke?

A photo posted by onceabcofficial (@onceabcofficial) on Feb 17, 2016 at 4:48pm PST

According to Entertainment Weekly, Emma (Jennifer Morrison), Regina (Lana Parrilla), Snow (Ginnifer Goodwin), Charming (Josh Dallas), Robin (Sean Maguire), Henry (Jared Gilmore), and Gold (Robert Carlyle) came in the Underworld to look for the character of Colin O'Donoghue.

However, they were surprised that their searching won't be easy as they encountered the creatures of the other place. They saw spirits who still wants to do something, like vengeance that made the mission of the heroes complicated.

In the picture revealed, Cora (Barbara Hershey) seemed too happy when she encountered her daughter Regina in a reunion. Peter Pan (Robbie Kay), on the other hand, didn't look that excited when he met his son, Gold.

Additionally, as they were entering their centennial episode, the Evil Queen has something to give for Regina, which was said the "perfect birthday gift." Meanwhile, the winter premiere followed the episode "Swan Song."

To recall, the last installment predicted the coming of the "dark siege in Storybrooke," Latin Post noted. The Dark Ones pursue the use of the living to make their way to the "resurrection of the realm."

"With doom imminent, Gold advises Mary Margaret, David and the rest of the heroes to spend their last fleeting moments enjoying the company of their loved ones," the official recap cited. "Emma, however, refuses to give up, knowing that she is responsible for righting all the poor choices she made as Dark One -- there's only one problem, Dark Hook," the episode's official recap stated."

When they entered the Hade's territory, the protagonists faced good and bad souls, who evidently have something against them. "Souls of the Departed" will air on March 6, Sunday on NBC.