Thunder, Thunder, Thundercats, Hoooooooooooo! This is one of my childhood favs. Most episodes would culminate with Lion-O using his sword to defeat the evil Mumra. Some of the most memorable episodes were the multi parters like the one where Lion-O had to defeat all the other cats to become to true leader, and the one were a new foe, the berserkers were introduced, and broke the sword. some other cats were eventually introduced, but they were not as cool as the originals.
oh yeah, they had an annoying catlike creature called snarf, that seemed to get more and more screen time. this show is probably more nostalgic than good, but i would love an upated vesrion of the show, if done seriously.