Credit: Michael Buckner/Getty Images; Paul Mounce/Corbis Wire

Once Upon a Time is hoping to “Think Lovely Thoughts” with Season 3, Episode 8, but that’s easier said than done with Peter Pan potentially leading Henry to his death, a showdown in Neverland, and young Rumplestiltskin’s relationship with his father, Colin (played by Stephen Lord, pictured above), is revealed.

In a newly-released synopsis for the November 17 episode, we discover that The Charmings & Co. are finally closing on on Pan, prepared to save Henry, though it may be too late with the truest believer embarking on a mission to a secret cave to save the island and its magic.

Oh, and remember how we told you that Marilyn Manson would guest-star as the voice of Pan’s shadow? He finally speaks — and maybe sings — in this episode, so we’re in for quite a treat.

Read on for the full synopsis, then hit the comments with your thoughts about “Think Lovely Thoughts”:

“Pan leads Henry to a secret cave, where he has convinced the boy that he alone can save magic and Neverland itself. But a showdown between good and evil is about to go down as Emma, Mary Margaret, David, Regina, Mr. Gold and Hook find themselves directly on a path to Pan in an effort to save Henry. Meanwhile, back in the Fairy Tale Land that was, young Rumplestiltskin is given a magical item that could help him make a fresh start with his father — who has been anything but a good dad.”

Once Upon a Time airs Sundays at 8 p.m. ET on ABC.

Alyse Whitney is Assistant Editor at Wetpaint Entertainment. Follow her on Twitter and Google+.