Siege Perilous

"Siege Perilous" is the third episode of Season Five of ABC's Once Upon a Time. It was written by Jane Espenson, and directed by Ralph Hemecker. It will be the ninety-second episode of the series overall, and will premiere on October 11, 2015.

Synopsis
In Camelot, the heroes feverishly work to free Merlin. Determined to help Emma, David embarks on a quest to retrieve a magical relic that Regina could use to communicate with the imprisoned sorcerer, but, when David leaves, Arthur insists on joining him because the dangers ahead are greater than he can imagine. Meanwhile, Mary Margaret discovers the fate of her old friend Lancelot. Back in Storybrooke, Arthur seeks David's help to catch a thief who threatens the safety of the citizens of Camelot. Across town, Emma reaches out to a conflicted Hook as she sets about her plan to draw Excalibur from the stone.

Starring

 * Ginnifer Goodwin as Snow White/Mary Margaret Blanchard
 * Jennifer Morrison as Emma Swan
 * Lana Parrilla as Evil Queen/Regina Mills
 * Josh Dallas as Prince Charming/David Nolan
 * Emilie de Ravin as Belle/Belle French
 * Colin O'Donoghue as Hook
 * Jared S. Gilmore as Henry Mills
 * Rebecca Mader as Zelena
 * Sean Maguire as Robin Hood
 * Robert Carlyle as Rumplestiltskin/Mr. Gold

Guest Starring

 * Lee Arenberg as Grumpy/Leroy
 * Beverley Elliott as Granny/Granny
 * Liam Garrigan as King Arthur
 * Joana Metrass as Guinevere
 * Sinqua Walls as Lancelot
 * David-Paul Grove as Doc/Doc
 * Gabe Khouth as Sneezy/Mr. Clark
 * Faustino Di Bauda as Sleepy/Walter
 * Michael Coleman as Happy/Happy
 * Mig Macario as Bashful/Bashful
 * Jeffrey Kaiser as Dopey/Dopey
 * Giacomo Baessato as Grif

Trivia

 * -|Production Notes=

Production Notes

 * In Arthurian Legend, Siege Perilous is a vacant seat at the Round Table reserved for the knight who would one day be successful in the quest for the Holy Grail. The seat is so strictly reserved that it is fatal to anyone else who sits in it.