a meteor lands in the middle east, and the Science Patrol is sent to investigate. they find an ancient city and a giant monster with a gravity weapon.
the monster is Antlar, one of the coolest Ultra Monsters of all time. oddly enough, he's only shown up two other series, and that was Max and Ultra Galaxy Neo. it's such a great looking design, but perhaps just too complex to do more than once back in the day?
he's also one tough monster, taking a Spacium Beam and not even budging.
the episode itself is interesting, as Ultraman is referred to the God of Noah, which can't quite be true. they really downplayed that completely in the US dub.