Cubert J. Farnsworth

Cubert Farnsworth is a clone of the Professor, created from cells scraped from "one of the shapelier growths" on the Professor's back. He and the Professor refer to their relationship as one between a father and son.

He is heir to Planet Express and the Professor's fortune, being the Professor's closest living relative. He spends most of his time with the Planet Express crew criticising everything, routinely pointing out logical fallacies.

Cubert goes to school with Hermes' son, Dwight, where they are occasionally bullied by Brett Blob, the son of H. G. Blob.

In "The Late Philip J. Fry", he grows up and marries Leela. But later they get divorced.

Family

 * Professor Farnsworth, identical DNA
 * Philip J. Fry, many-times-great uncle
 * Igner, genetic son

Production
Cubert was originally supposed to appear in "A Big Piece of Garbage", but his appearance in that episode would have made the episode at least an hour long. Cubert's purpose was originally to appear in almost every episode, constantly pointing out flaws in the logic of the Futurama universe (such as odour travelling through space or flying faster than the speed of light), but even the writers got annoyed with this and feared the audience would despise him beyond his intention.

His character developed further in "The Route of All Evil" and "Bender Should Not Be Allowed on Television", distancing from his original purpose of pointing out flaws to be a real child representation of the Professor.

Trivia

 * Cubert may be missing a toe (4ACV07).
 * The rest of the characters have progressed in some way, i.e: The professor saying he is 165 in Bender's game as opposed to 160, Cubert remains the exact same as in his first appearance.