Never really watched it besides the first half of the 1st season, which i thought was mediocre

Im watching the series where she realises she's been missing for 2 years and finds out all the illegal crap she's been up to since them. Which season is this?

"Now TV's all about format these days isn't it, and I've got a new type for you right here. Its me and Paris Hilton driving around in a car.... Now I know what you're thinking, but she's in the boot!" "So you see, 'Ring around the Rosey' refers to the horrible symptoms of a terrifying disease, a disease which.....a disease which....ZIM! Theres a Pigeon on you're head. You have 'Head Pigeons'. get to the Nurse before they spread to the other children." "Get off my lawn Cookie Beast!" --Invader Zim