STAGE TUBE: Interview With ONCE UPON A TIME's Musical Composer Mark Isham

In this exclusive ABC interview, composer Mark Isham talks about the important role that music plays in setting the tone and the mood in ABC's popular drama series ONCE UPON A TIME. View the interview below!

In ABC's ONCE UPON A TIME, master storytellers Edward Kitsis and Adam Horowitz have written a modern fairytale with thrilling twists and hints of darkness, brimming with wonder and filled with the magic of our most beloved stories.

And they lived happily ever after... or so everyone was led to believe. Emma Swan (Jennifer Morrison, "House") knows how to take care of herself. She's a 28-year-old bail bondsperson who's been on her own ever since she was abandoned as a baby. But when Henry (JarEd Gilmore, "Mad Men") -- the son she gave up years ago -- finds her, everything changes. 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 that she's Snow White (Ginnifer Goodwin, "Big Love") and Prince Charming's (Josh Dallas) missing daughter. According to his book of fairytales, they sent her away to protect her from the Evil Queen's (Lana Parrilla) curse, which trapped the characters of fairytale world forever, frozen in time, and brought them into our modern world.

In order to understand where the fairytale world's former inhabitants came from, and what ultimately led to the Evil Queen's wrath, you'll need a glimpse into their previous lives to learn their origins. But it might just turn everything you've ever believed about these characters upside-down.

Meanwhile, the epic battle for the future of all worlds is about to begin. For good to win, Emma will have to accept her destiny and fight like hell.

"Once Upon a Time" stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Robert Carlyle ("The Full Monty," "Trainspotting," "SGU Stargate Universe") as Rumplestiltskin/Mr. Gold, Lana Parrilla as Evil Queen/Regina, Eion Bailey as August, JarEd Gilmore as Henry, Josh Dallas as Prince Charming/David and Raphael Sbarge as Jiminy Cricket/Archie.