Where's Homer's Brother when You Need Him?

Delving even deeper into geek-hood here: somewhere in all the books we had to stash away when Max started walking (he liked to pull the big art books onto himself) would be this one. In that book would be a page that would tell me Homer Simpson's lost-lost brother's name (I do remember him being voiced by Danny Devito). It would would tell me the episode number, funny quotes, writers, director, everything. But I'm not getting up to look this stuff up. I'm not, I'm not, I'm not.

What is important is that, in that episode, Homer's brother invents a machine to translate baby babbles and cries. It would come in handy about now. It might explain why the boy is obsessed with Perrier bottles.