Cytherian
A Cytherian greets the crew of the USS Enterprise-D
This Cytherian greeted the USS Enterprise-D when it was transferred to the center of the galaxy by a subspace warp initiated by Reginald Barclay after he had interfaced with the Argus Array.
The Cytherian explained that he and his people were explorers just like Humans, except they brought different species to them in order to exchange information. (TNG: "The Nth Degree")
The Cytherian was played by Kay E. Kuter.