HENRY EXPLORES THE INSIDE OF A MYSTERIOUS SINKHOLE TO SEE IF ITS CONTENTS CAN LINK STORYBROOKE TO THE FAIRYTALE WORLD, AND JIMINY CRICKET YEARNS TO LEAVE THE FAMILY BUSINESS AND TRANSFORM INTO THE PERSON HE WANTS TO BE, ON ABC'S "ONCE UPON A TIME"

"That Still Small Voice" - As Sheriff Graham deputizes Emma, the ground shakes and a giant sinkhole mysteriously appears at the edge of town. But a curious Henry's life is placed in danger when he decides to explore the innards of the sinkhole to see if its contents can link the inhabitants of Storybrooke to the fairytale world. Meanwhile, back in the fairytale world, Jiminy Cricket yearns to leave the family business and transform into the person he wants to be, on "Once Upon a Time," SUNDAY, NOVEMBER 27 (8:00-9:00 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, Robert Carlyle as Rumplestiltskin/Mr. Gold, Lana Parrilla as Evil Queen/Regina, Jared Gilmore as Henry Mills, Josh Dallas as Prince Charming/John Doe and Raphael Sbarge as Jiminy Cricket/Archie Hopper.

Guest starring are Jamie Dornan as Sheriff Graham, Tony Amendola as Marco/Geppetto, Anastasia Griffith as Kathryn/regal blonde, Adam Young as pickpocket/young Jiminy, Morgan Roff as teenage Jiminy, Keegan Connor Tracy as Blue Fairy, Meghan Ory as Ruby/Red Riding Hood, Carolyn Hennesy as Myrna/puppet princess/puppet dragon, Harry Groener as Martin/puppet prince, Jarod Joseph as Billy, Laura Bertram as Donna, Luke Camilleri as Stephen and Michael Strusievici as fairytale boy.

"That Still Small Voice" was written by Jane Espenson and directed by Paul Edwards.

"Once Upon a Time" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with a 5.1 channel surround sound. A TV parental guideline will be assigned closer to the airdate.

For more information on "Once Upon a Time," visit ABC.com