Cubert Farnsworth (voiced by Kath Soucie) is Professor Farnsworth 's clone, which the Professor produced to serve as his heir and continue his scientific legacy. He is introduced in the episode " A Clone of My Own ", in which he rejects Farnsworth and becomes hostile to the entire Planet Express crew. Professor Farnsworth reveals that he had been lying about his age, and is taken to the Near Death Star for retirement. The crew rescues the professor using Cubert's (and thus the Professor's) DNA to gain entry, and Cubert announces that he will continue the professor's science after all.