Zanan

Zanans are a sapient extraterrestrial race from the planet Zana, which are both physically indistinguishable from and genetically-compatible with Humans.

Biology
Zanan bodies are vulnerable to Earth diseases, to which they have no natural immunity. Zanan-Human hybrids are more resistant, but still susceptible to being killed even by relatively harmless illnesses.

Culture and society
Zanans are pacifists and claim that there haven't been any weapons on their planet for thousands of years. Their technology includes force fields that can encircle an entire island and render it invisible.

Appearances

 * The Six Million Dollar Man, s05e16, "The Lost Island" (1978)