<P> As they split up Regina and Robin are being followed by a resident (the person that Regina choked back in the Enchanted Forest), who leads them to Cora, who is the mayor of the Underworld Storybrooke . Cora offers Regina a way out, telling her she has one hour to leave on the ferry with Henry and Robin . She then takes Regina to a ledge over the Phlegethon, the River of Fire . She threatens to send Regina's father to a worse place if Regina does not comply, and she uses her messenger as an example by sending him off into the flames . Around the same time, Mary Margaret enters a Underworld version of Granny's and is recognized by the Blind Witch by her smell, and is then encountered by David wearing different clothes and proceeds to kiss her, as she realizes it's James, who is the "Sheriff" in this world . Gold goes to the Underworld version of his pawn shop and encounters his father Malcolm, whose soul must live as Peter Pan . Knowing already what Gold wants, Pan is willing to make a deal with no strings attached . However, he urges Gold to leave the Underworld, telling him that the others aren't his real friends, but Gold ignores his plea, accepting some sort of potion . Pan ominously adds that he himself would be able to leave, if only he could trade places with a living soul, although Gold refuses this . As everyone meets up again, Regina tells the others about Cora's warning, while Gold gives Emma the potion he obtained, which is from DunBroch, and can be used to summon the dead by pouring it over someone's grave . Gold explains it can be used to summon Hook and ask him where he is, but will not join them as he has decided that he is returning to Storybrooke . </P> <P> The group travels to the site of Hook's grave (everyone in the underworld has a grave site) and Emma pours the ale of Seonaidh potion (Seonaidh is a Celtic water spirit from the Isle of Lewis) on the ground but lacks the power to bring him back, although they get a glimpse of an injured Hook before the potion wears off . Regina uses the potion and finds the soul of her father Prince Henry . Prince Henry tells Regina she has come too far to betray her friends now and tells her she must stay . Regina races to the banishment site with Henry as Cora attempts to banish the elder Henry, only to see the flames die down and a pathway to heaven open up . Since Regina has chosen to stay, remain a hero, and is no longer under the influence of her mother, Prince Henry's unfinished business is resolved . With his soul at peace, he is accepted into "a better place," and departs the Underworld after saying goodbye to Regina and Henry, who meets his namesake for the first time . The heroes realize they could potentially rescue all the souls here, and continue their quest to find Hook with this in mind . Cora meets with the ruler of the Underworld, Hades, who wishes the heroes gone (the clock on the broken tower will tick each time a soul leaves the Underworld), and punishes Cora for her failure with an eternity as a miller's daughter once again . </P> <P> This episode would become the final one that was produced by Scott Nimerfro, who died on April 17, 2016 after a battle with angiosarcoma, a cancer in the inner lining of the blood vessels . </P> <P> The episode received positive reviews, but noted that there are areas the producers could make improvements on . </P>

Once upon a time souls of the departed cast