Lakksis was a robot serving tourists on the holiday planet Nestra. Lakksis was invented by a Thetran named Korriklimm. His programming included an ability to learn from his experiences, but he could not extrapolate from them. He was also programmed to give tourists visiting Nestra whatever they wanted. After he had captured the Doctor and Janis, the Doctor explained to him that sometimes people need things that are unpleasant, like medicine or healthy food. Lakksis seemed to appreciate this information, but before he could put it into use, Janis blasted his head off.