Futurama Episodes

It’s Farnsworth’s 150th birthday, and a party is being held for him at Mars University. However the party makes him realize there is so much he has to do, and so little time to do it. Back home, he reveals his clone, Cubert Farnsworth, who looks and acts like an obnoxious 12 year old brat. The crew soon takes a dislike to Cubert. Farnsworth is crushed when Cubert tells him he doesn’t want to be a scientist because Farnsworth’s inventions never worked.
wikipedia.org summary:
Farnsworth celebrates his 150th birthday, but begins to grow concerned about what will become of his inventions after he is gone, so he names a clone of himself, Cubert Farnsworth, to be his successor. However, Cubert shows no interest in becoming an inventor and harshly criticizes all of Farnsworth’s ideas and inventions. Saddened, Farnsworth leaves a will revealing that he is in fact 160 years old, the age when people are taken to the Near-Death Star, a retirement home-like facility from which they never return. The crew and Cubert rescue Farnsworth while he is still unconscious, but their ship’s light-speed engines are damaged. Fortunately, a blow Cubert sustained to the head during the escape causes him to gain Farnsworth’s understanding of how the engines work. The crew safely returns to Earth, and Cubert tells Farnsworth that he has decided to follow in his “father’s” footsteps.
imdb.com summary:
Prof. Farnsworth reveals that he cloned himself years ago and introduces his clone to the Planet Express staff.