My favourite episode is easily, Jurassic Bark.

Some other episodes that come close are:

Leela's Homeworld
I, Roommate.

LESS THAN HERO!

my fav episode is possible the one where they all have to go into fry's body to destroy the worms.

other ones i like are the first one because its the first ever episode. and also the one about fry's older brother and how fry believes his brother stole his identity

the one with the worms is called Parasites Lost

my favorite episode was The Sting, thats the one where Leela thought Fry was actually dead, after being stung by a space bee, but it was really her who was half dead in a hospital, and ect..

three humdred big boys , is my favrite ,also Anthology of Interest 1and 2

Anthology was funny...

Hey. I'm going to have to say The Farnswoth Parobox.

Spanish Fry baby! That and War is the H Word... Oh! and The Deep South

I forgot what Spanish Fry baby was about I needa refresh my memory