Guest Stars Dee Bradley Baker voices additional voices Mark Hamill voices Fire Lord Ozai André Sogliuzzo voices Hakoda Richard McGonagle voices Bato André Sogliuzzo voices additional voices Kevin Michael Richardson voices additional voices Michael Dow voices Haru Daniel Samonas voices Teo René Auberjonois voices Mechanist Kevin Michael Richardson voices Tyro Mark Hamill voices additional voices Wayne Duvall voices Warden Poon Kristoffer Tabori voices War Minister