What will happen during the two-hour season finale of Once Upon a Time set for Sunday, May 11?

The two-hour season finale will be two episodes, “Snow Drifts” and “There’s No Place Like Home.” During the finale, Margaret and David will celebrate the naming of their son during a coronation at Granny’s Diner. Emma and Hook will go back in time and find themselves in the Enchanted Forest of the past. They will need to take care not to alter the anything as they try to find their way back to the present. They could risk altering the lives of their friends and family, not to mention their own existence.

Once Upon a Time stars Ginnifer Goodwin, Jennifer Morrison, Lana Parrilla, Josh Dallas, Emilie de Ravin, Colin O’Donoghue, Michael Raymond-James, Jared S. Gilmore and Robert Carlyle.

Guest stars include Lee Arenberg, Anastasia Griffith, Tony Amendola, Meghan Ory, Alex Zahara, Beverley Elliott, Rebecca Mader, David-Paul Grove, Gabe Khouth, Faustino Di Bauda, Sean Maguire, Christopher Gauthier, Charles Mesure, Keegan Connor-Tracy, Raphael Sbarge, Sarah Bolger, Jeffrey Kaiser, Mig Macario, Eric Keenleyside and Raphael Alejandro.

David H. Goodman and Robert Hull wrote “Snow Drifts” with Rob Underwood directing. Edward Kitsis and Adam Horowitz wrote, “There’s No Place Like Home” with Ralph Hemecker directing.

The Once Upon A Time season finale will air May 11 from 8:00-10:01 p.m., ET.