Watch beginning of 'Once Upon a Time' early

In an unprecedented move for Disney/ABC Television Group's WATCH services, the first act of Sunday's anticipated premiere of "Once Upon a Time, " featuring the chilly debut of Elsa from Disney's "Frozen," is live now for authenticated viewers on WATCH ABC, WATCH Disney Channel and WATCH ABC Family. It will be available to all viewers on each platform beginning Friday. This is the first time all three networks have debuted content from the same show on their WATCH services.

Disney/ABC Television Group's WATCH services enable fans to watch their favorite ABC, ABC Family and Disney Channel programming whenever and wherever they are on desktops, smartphones, tablets and connected TVs. Authenticated subscribers of Comcast, Cablevision, Cox Communications, Charter Communications, DISH, Midcontinent Communications, Verizon FiOS, Google Fiber and AT&T U-verse, among others, also can watch a 24-hour live stream of each network, as well as access advantaged window episodes.

In the season premiere episode "A Tale of Two Sisters," a scared and confused Elsa finds herself in Storybrooke and, fearful of the intentions of its residents, creates a powerful snow monster for protection. With Robin Hood's wife, Marian, back in the picture, Regina wonders if her "happily ever after" with the former thief has been completely quashed. Meanwhile, on their honeymoon, Mr. Gold finds an intriguing object that makes him question whether or not he should officially give Belle control over the dagger that makes him The Dark One, and Hook is dismayed to discover Emma seems to be avoiding him while she tries to help comfort Regina after being the one responsible for bringing Marian back from the past and into Storybrooke. Meanwhile, in Arendelle of the past, as Elsa's sister Anna's wedding to Kristoff nears, Anna discovers their parents - who died on-ship during a violent storm - were heading to a mysterious destination in a quest that may have held the secret to containing Elsa's out-of-control ice powers. And against Elsa's wishes, Anna wants to finish their journey to find out what they were looking for, on "Once Upon a Time," Sunday, Sept. 28 (8 p.m., ET), on ABC.

"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 Nolan, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Jared S. Gilmore as Henry, Michael Socha as Will Scarlet and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest starring are Lee Arenberg as Leroy/Grumpy, Faustino Di Bauda as Walter/Sleepy, Giancarlo Esposito as Sidney/Magic Mirror, Sean Maguire as Robin Hood, Georgina Haig as Elsa, Elizabeth Lail as Anna, Scott Michael Foster as Kristoff, Oliver Rice as noble man, Pascale Hutton as regal woman, Raphael Alejandro as Roland, Jason Burkart as Little John, Christie Laing as Maid Marian and John Rhys-Davies as Grand Pabbie.