A Challenge to the Underground

1 Ultra Operation No. 1 2 Defeat the Invaders! 3 Sally Forth, Science Patrol! 4 5 Seconds Before The Big Explosion! 5 Treasure of the Miloganda 6 The Coast Guard Command 7 The Blue Stone of Baradhi 8 The Lawless Monster Zone 9 Operation: Lightning Speed 10 The Mysterious Dinosaur Base 11 The Ruffian from Outer Space 12 The Cries of the Mummy 13 Oil S.O.S. 14 The Pearl Oyster Protection Directive 15 The Terrifying Cosmic Rays 16 The Science Patrol to Outer Space 17 Passport to Infinity 18 The Brother from Another Planet 19 The Demons Once More 20 Terror on Route 87 21 Break Through the Smoke! 22 The Underground Destruction Work 23 My Home is Earth 24 The Undersea Science Base 25 Mystery Comet Tsuifon 26 Monster Majesty (1) 27 Monster Majesty (2) 28 Human Specimens 5 & 6 29 A Challenge to the Underground 30 The Snowy Mountain of Illusions 31 Who Has Come? 32 The Endless Counterattack 33 The Forbidden Words 34 Gift From the Sky 35 The Monster Graveyard 36 Don't Shoot, Arashi! 37 The Little Hero 38 The Spaceship Rescue Command 39 Farewell, Ultraman!