Once Upon A Time: Journey to the Center of the Earth

Journey to the Center of the Earth is the sixteenth episode of the American/Japanese animated series Once Upon A Time.

Main Cast

 * Colleen O'Shaughnessey as Shawn, Emily, Toby
 * Kyle Hebert as Cornelius
 * Fred Tatasciore as Rex

Guest Stars

 * Tony Oliver as Professor Otto Lidenbrock
 * Yuri Lowenthal as Axel
 * Steve Blum as Hans Bjelke
 * Laura Bailey as Grauben