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.
The rest of the episode youll have to see, it is a very funny episode and I think in the top 10 episodes of futurama