Norman
Norman was the "leader" of a group of androids who inhabited the planet Mudd. 

In 2268, Harry Mudd, who became stranded on the planet which he named after himself, sent Norman to capture a Federation starship so that he could leave the planet in exchange for the vessel's crew. 

Norman left the planet and, posing as a Starfleet sciences division lieutenant, signed aboard the . To keep his android nature from being discovered, he skipped two appointments Doctor Leonard McCoy made for his physical without giving a reason, something which McCoy found suspicious. 

After successfully taking over the ship, Norman redirected it to Mudd to carry out "Lord" Mudd's plan, finally revealing his nature to James T. Kirk and Spock.

The plot ultimately failed. Captain Kirk and Spock correctly hypothesized that the android population was essentially a hive mind and that Norman was the central control locus. The androids were deactivated when Norman's processors were unable to deal with a flood of illogic presented to him by the Enterprises crew, causing him and the rest of the androids to shut down.

The breakdown, however, was only temporary, as Norman later returned to bid farewell to the Enterprise crew. ()

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USS Enterprise (NCC-1701) personnel
Starfleet sciences personnel
Androids