15 episode serial: (1) The Riven Flag; (2) The Leap Through Space; (3) The Creeping Death; (4) The Gripping Hand; (5) The Human Shield; (6) The Height of Torment; (7) Into the Trap; (8) The One Chance; (9) The Crashing Horror; (10) Double Crossed; (11) The Ship of Dread; (12) The Volcano's Prey; (13) The Flood of Despair; (14) The Living Catapult; and (15) The Rescue.