Watch Once Upon a Time Season 5, Episode 4 The Broken Kingdom Online

After receiving a cryptic warning from Lancelot about Arthur's intentions, Mary Margaret realizes Arthur may be the heroes' biggest threat, but when she is unable to convince David of the danger, she takes matters into her own hands. Meanwhile, Hook's unwavering love for Emma provides a glimmer of hope in her struggle against the unrelenting voice of Rumplestiltskin. In a Camelot flashback, Guinevere senses that Arthur is losing his way, consumed by his obsession with making Excalibur whole, so she sets out with Lancelot on her own quest into the heart of darkness. In Storybrooke, Dark Emma unleashes a secret weapon in the next phase of her plan to find the brave soul she needs to draw Excalibur from the stone. From the inventive minds of Lost executive producers Adam Horowitz and Edward Kitsis comes a bold new imagining of the world, where fairy tales and the modern-day are about to collide. And they all lived happily ever after - or so everyone was led to believe. Emma Swan knows how to take care of herself. She's a 28-year-old bail bonds collector who's been on her own ever since she was abandoned as a baby. But when the son she gave up years ago finds her, everything starts to change. Henry is now 10 years old and in desperate need of Emma's help. He believes that Emma actually comes from an alternate world and is the missing daughter of Snow White and Prince Charming. According to his book of fairytales, they sent her away to protect her from the Evil Queen's curse, which trapped the fairytale world forever, frozen in time, and brought them into our modern world. Of course Emma doesn't believe a word, but when she brings Henry back to Storybrooke, she finds herself drawn to this unusual boy and his strange New England town. Concerned for Henry, she decides to stay for a while, but she soon suspects that Storybrooke is more than it seems. It's a place where magic has been forgotten, but is still powerfully close... where fairytale characters are alive, even though they don't remember who they once were. Emma will have to accept her destiny and fight for everything that once was.