"Snow Drifts"/"There's No Place Like Home" - While Mary Margaret and David celebrate the naming of their son at a coronation in Granny's Diner, Emma and Hook are pulled into Zelena's time portal and find themselves in the Enchanted Forest of the past. But in their quest to discover a way back, they must be careful not to change ANYTHING or risk altering the lives of their friends and family -- as well as their very own existence, on the two-hour season finale of "Once Upon a Time," SUNDAY, MAY 11 (8:00-10:01 p.m., ET) on the ABC Television Network."Once Upon a Time" stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Lana Parrilla as the Evil Queen/Regina, Josh Dallas as Prince Charming/David, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Michael Raymond-James as Baelfire/Neal Cassidy, Jared S. Gilmore as Henry Mills and Robert Carlyle as Rumplestiltskin/Mr. Gold.Guest starring in "Snow Drifts" are Lee Arenberg as Leroy/Grumpy, Anastasia Griffith as Abigail/Kathryn, Tony Amendola as Geppetto, Meghan Ory as Ruby/Red, Alex Zahara as King Midas, Beverley Elliott as Granny, Rebecca Mader as Zelena, David-Paul Grove as Doc, Gabe Khouth as Sneezy, Faustino Di Bauda as Sleepy, Sean Maguire as Robin Hood, Christopher Gauthier as Smee and Charles Mesure as Black Beard.Guest starring in "There's No Place Like Home" are Lee Arenberg as Leroy/Grumpy, Keegan Connor-Tracy as Blue Fairy/Mother Superior, Meghan Ory as Ruby/Red, Raphael Sbarge as Archie Hopper/Jiminy Cricket, Beverley Elliott as Granny, Sarah Bolger as Aurora, David-Paul Grove as Doc, Gabe Khouth as Sneezy, Faustino Di Bauda as Sleepy, Jeffrey Kaiser as Dopey, Mig Macario as Bashful, Sean Maguire as Robin Hood, Eric Keenleyside as Sir Maurice/Moe French and Raphael Alejandro as Roland."Snow Drifts" was written by David H. Goodman & Robert Hull and directed by Ron Underwood."There's No Place Like Home" was written by Edward Kitsis & Adam Horowitz and directed by Ralph Hemecker.