Japan's Amazing Three (Known as Wonder Three over there) marks 50 years this year. Unfortunately, it currently doesn't have any American cabler interested in picking it up.
It took two years before an independent company imported the series to the US, and it lasted just 1 season in both the US & Japan. It also started as a manga (Japanese comic book) before going to television. I had never seen the show, so there isn't going to be a rating, but reading the Wikipedia entry helped inform me about the series. Seems that one of the aliens, Bokko, who adopted the form of a rabbit, had a crush on the Earth boy the Three teamed with, known as Kenny Carter here in the US, or Shinichi Hoshi in Japan, and wanted to take on a human appearance to be with him. Talk about unrequited love.
At least one episode is available, but in Japanese with English subtitles. Instead of that, we'll leave you with the open/close of the American import of the series, with theme music by Ron Muller.