You Can’t Trust A Man What’s Made Of Gas
“The Craziest Space Racists Of All Time” at io9.com offers a decent overview of allegories of race and racism in science fiction — although apparently racism magically enters sci fi only when it’s conscious, explicit, and denounced — but its real value is its citation of the great Mr Show sketch “Racist in the Year 3000″:

Thank you much for bringing this incredible sketch back to the front of my mind. I used to call bartenders Gleep Glop all the time after this aired.