DAVID ENLISTS HOOK'S EXPERT SERVICES WHEN HE SETS OUT TO DISCOVER THE TRUTH ABOUT HIS FATHER'S DEATH, AND REGINA HELPS ROBIN ADJUST TO LIFE IN STORYBROOKE, ON ABC'S 'ONCE UPON A TIME'

Eion Bailey Guest Stars as Pinocchio/August

Sean Maguire as Robin of Locksley

"Murder Most Foul" - Before Hook takes the next step in his relationship with Emma, he wants to make sure David sees him as more than just a pirate. So when David asks Hook to help him uncover the truth about his father's death, Hook agrees. Meanwhile, Regina works to acclimate Robin to life in Storybrooke, but soon discovers he has a dark side that makes the task much more complicated than she anticipated, on "Once Upon a Time," SUNDAY, MARCH 12 (8:00-9:00 p.m. EST), 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, Jared S. Gilmore as Henry Mills, Rebecca Mader as the Wicked Witch/Zelena and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest starring are Sean Maguire as Robin of Locksley, Raphael Sbarge as Jiminy Cricket/Dr. Archie Hopper, Eion Bailey as Pinocchio/August, Alan Dale as King George/Spencer, Wil Traval as the Sheriff of Nottingham/Keith, David Cubitt as Robert, Tara Wilson as Ruth, Matt Ellis as Francisco, Bart Anderson as Innkeeper and Luke Roessler as Young David/Young James.

"Murder Most Foul" was written by Jerome Schwartz & Jane Espenson and directed by Morgan Beggs.

"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.