Animorphs Season 1 Episode 1

Elfangor: I am Elfangor, of the Andalite world. I've come... (groans)
Cassie: Jake, give me your shirt. He's wounded.
Elfangor: There's nothing you can do for me.
Rachel: It's gonna be okay. Cassie knows a lot about animals.
Marco: Way to insult the guy, Rach.
Elfangor: The wound is fatal. I will die. But there will be others.
Jake: Others?
Elfangor: Unlike me, they have come to destroy you.

Jake: From now on, we just talk to each other. Trust no one... Principal Chapman's a controller.

Jake: It was so bizarre. I was trapped. I had no other choice and I remembered what the alien said, so I put my hand on Homer and I started concentrating. All of the sudden I started.. mutating.. I could hear my bones crunching and twisting. I watched my palms become paws. I became my dog.

Marco: You know...funniest thing happened to me last night. Some blue dude with four legs put me and a few other idiots in charge of saving the world.

Elfangor: The Yeerks are parasites. They must have a host to live in. On Earth their hosts are humans. They enter your brain and take over your thoughts and feelings. These hosts are called 'controllers'. They can be anyone, your family, your friends. Earth is their next target.

Rachel: Maybe we should try talking to it.
Marco: Yeah. Just let me get out my Alien/English dictionary.

Jake: (to Homer) Stay.
Marco: Oh sure. The dog gets to stay.