Once or twice before I've made a case for diversity as a hallmark of good science fiction. Regardless of one's present political affiliations, we like our sci-fi casts to be a plurality of uncanny and unfamiliar characters. The future of our species is, in part, dependent upon how well we get along with other forms of sentient life. So which stellar explorers would earn the stamp of approval from the Rainbow Coalition of the 24½th Century? After weeding out (most) all-human crews (sorry BSG!) and some of the less well-known teams (sorry Bucky O'Hare!), I've come up with a top five list. We've got genetic mutants, alcoholic robots, holograms, bisexual aliens, snarky A.I., clones, cryonauts, cyborgs, and every variant of human being imaginable. Did I leave anyone out? 5. The Space Shuttle Discovery Crew Mission STS-116 (pictured above) The only all-human (and real) crew on my list, the STS-116 mission broke all sorts of records, with two African-Americans, two women, two European Space Agency astronauts, and a Jewish-Korean American pilot. Normally I am loath to describe any group of people by their various identities, instead of their individual personalities and achievements, but in light of the homogeneous nature of the earlier space program and much of sci-fi, the fact that a crew this diverse already exists is wonderful. STS-116 is both an excellent sign we're moving in the right direction and a perfect first entry for this list. 4. Red Dwarf