Once Upon A Time: 20,000 Leagues Under the Sea

20,000 Leagues Under the Sea is the ???? 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

 * TBA as Captain Nemo