Guest Stars Frank Welker voices Lance Goodwin Casey Kasem voices Alexander Cabot III/Jack Canna's Partner/Ghost of Injun Joe Jackie Joseph voices Melody Valentine Janet Waldo voices Josie McCoy Don Messick voices Sebastian the Cat/Captain Cannaby/Jack Canna/Ghost of Captain Scavenger John Stephenson voices Johnny Briggs Sherry Alberoni voices Alexandra Cabot Jerry Dexter voices Alan M. Mayberry Barbara Pariot voices Valerie Brown