I am sure a lot of people have noticed that there are more aliens in the PT than in the OT. The two explanations I hear are : 1. Lucas didnt have the technology to make a lot of aliens in the OT. 2. The Empire is anti-alien. I tend to believe the former more than the latter. Also, for the OT, Lucas probably didnt want the audience to get too alienated (no pun intended), which can happen if a film has too many fantasy elements (another reason why people dont like the PT as much as the OT.)TPM has the most aliens b/c it was designed to be more of a kid's movie. Has there been any confirmation that the Empire is anti-alien? I welcome anybody to post evidence of this. Dont be surpised if Lucas digitally turns some of the Imperial officers into an alien species in the rumored Archival Edition. Although there still wont be as many aliens as there are in the PT. I think it would be a good idea to make them into members of the Chiss species (like Admiral Thrawn). This would not look too kiddy like, but at the same time if would give a little more continuity to the PT.