Janel Moloney and Patrick Breen have signed on to co-star in ABC's fantasy pilot Captain Cook's Extraordinary Atlas, with 13-year-old Jodelle Ferland taking the lead role in the WBTV-produced project.

The Hollywood Reporter describes the series as Harry Potter meets Pan's Labyrinth. The story centers on Gwen (Ferland), an adventurous young girl who finds a magical atlas that reveals a secret world underneath ours.

In the pilot, written by Tom Wheeler and to be directed by Tommy Schlamme, Moloney and Breen will play Gwen's adopted parents. Also cast in the pilot is 10-year-old Nathan Gamble (Runaway), who will play Gwen's younger brother.