Here's a fun Prince Planet episode which introduces Frigina, one of Krag's aides. I'm still amazed that Hulu is showing this series, since it's one of the more obscure Japanese cartoons from the 60s. They have 47 of the 52 episodes, and I read a rumor that a company was going to make a DVD set of the show.
I wonder if Hulu will let this embed work, since I had to sign up for a free month to be able to watch the episodes. It's worth it, even if I paid for it, since they have some great shows on here that netflix doesn't have, like this and tons of other cartoons, including Gatchaman.