Barbara #4 and Barbara #322
The Barbara series was a group of 500 identical androids who inhabited the planet Mudd. They were designed according to the personal specifications of Harry Mudd. (TOS: "I, Mudd")
The Barbara Series was used as a model to describe to the Enterprise crew some of the engineering specifications of the Mudd Androids. Covered with a self-renewing plastic over a skeleton of beryllium-titanium alloy, the duration of this model was estimated at 500,000 years.
- The Barbara series was played by twin sisters Colleen and Morreen Thornton.