A Challenge to the Underground

1. Ultra Operation No. 11966-07-17 2. Defeat the Invaders!1966-07-24 3. Sally Forth, Science Patrol!1966-07-31 4. 5 Seconds Before The Big Explosion!1966-08-07 5. Treasure of the Miloganda1966-08-14 6. The Coast Guard Command1966-08-21 7. The Blue Stone of Baradhi1966-08-28 8. The Lawless Monster Zone1966-09-04 9. Operation: Lightning Speed1966-09-11 10. The Mysterious Dinosaur Base1966-09-18 11. The Ruffian from Outer Space1966-09-25 12. The Cries of the Mummy1966-10-02 13. Oil S.O.S.1966-10-09 14. The Pearl Oyster Protection Directive1966-10-16 15. The Terrifying Cosmic Rays1966-10-23 16. The Science Patrol to Outer Space1966-10-30 17. Passport to Infinity1966-11-06 18. The Brother from Another Planet1966-11-11 19. The Demons Once More1966-11-20 20. Terror on Route 871966-11-27 21. Break Through the Smoke!1966-12-04 22. The Underground Destruction Work1966-12-11 23. My Home is Earth1966-12-18 24. The Undersea Science Base1966-12-25 25. Mystery Comet Tsuifon1967-01-01 26. Monster Majesty (1)1967-01-08 27. Monster Majesty (2)1967-01-15 28. Human Specimens 5 & 61967-01-22 29. A Challenge to the Underground1967-01-29 30. The Snowy Mountain of Illusions1967-02-05 31. Who Has Come?1967-02-12 32. The Endless Counterattack1967-02-19 33. The Forbidden Words1967-02-26 34. Gift From the Sky1967-03-05 35. The Monster Graveyard1967-03-12 36. Don't Shoot, Arashi!1967-03-19 37. The Little Hero1967-03-26 38. The Spaceship Rescue Command1967-04-02 39. Farewell, Ultraman!1967-04-09