The android duplicate Doctor Brown, was created from the body of, and contained the consciousness of, the 23rd century Federation scientist. This android was created around 2261 by Dr. Roger Korby and Ruk from the records and machinary he found left behind on the planet Exo III by the planet's past inhabitants. After it was revealed that like "Brown," Ruk too was an android, it explained that it was "more complex than 'Brown'; much superior." (TOS: "What Are Little Girls Made Of?" )