Natives of Planet Cline are shape shifters, able to blend into any environment. The professor adopted a human disguise and uses the name Mark Cline. At his secret location he practices his hobby of duplicating interesting things he sees on Earth. Here he focuses on some unusual species. His ability to create personal histories for each of his identities is key to his surviving on Earth for many millennia.

The Professor maintains his own communication portal for the people of Earth.