The second entry of the Ultraman series (or third if you count Ultra Q). The story follows the alien Ultraseven from planet Nebula M-78, which enters planet Earth disguised as a human called Dan Moroboshi. He has the mission to protect the earth from several monsters and aliens that disturbs the planet's peace.
I remember watching this series when I was a kid (reruns), although only recently I bought the DVD collection and watched the entire series. I also found Ultraseven the coolest of all the Ultramen since he had a giant cutter on his head which he could detach from his body and use it as a boomerang to destroy his opponents
If you're a fan of giant monster tv shows you're definitely gonna love this show. The effects are pretty dated but it has a certain charm to it.

Ultraman and Kirby Collab when?