Banned Episode: "Hot Springs Planet Tenrei" never saw the light of day on America's Toonami block due to its excessive nudity and sexually suggestive content. Not even [adult swim] aired it during the show's short run there (though they simply re-aired the Toonami edits rather than making their own version). Over in the UK, the cartoon channel CNX attempted to air the episode, but a lot of cuts had to be made to pass the censors. This edit was too short and too messy to watch, so it was shelved. Unfortunate, because "Tenrei" was vital to the overarching plot.
This doesn't apply to those who watched the home video version, however, as the DVD's were always completely uncut and uncensored.
Dub Induced Plothole: If you only watched the TV broadcast, you might be wondering where Gene got those rare Caster shells. For the answer, see above (and seek out the DVD).
Keep Circulating the Tapes: Now Averted. Along with every other Bandai-licensed show, the rights to Outlaw Star fell into limbo when the company went belly-up in 2011. It took some time, but eventually this show, along with a few other Sunrise shows, found a new home at Funimation.