The Monsters find an alien called Sqweep in the woods doing an earth studies project, which has a lot of sensitive data that could be used for an invasion.

Monsters vs. Aliens Season 1 Episodes...

• s01e01 - Welcome to Area Fifty-Something
• s01e02 - Danger Wears a Diaper
• s01e03 - The Toy From Another World
• s01e04 - The Bath Effect
• s01e05 - The Fruit of All Evil
• s01e06 - Frenemy Mine
• s01e07 - Maximum B.O.B.
• s01e08 - It Came... on a Field Trip
• s01e09 - Educational Television
• s01e10 - Flipped Out
• s01e11 - The Wormhole Has Turned!
• s01e12 - The Two Faces of Dr. Cockroach
• s01e13 - The Thing with One Brain
• s01e14 - Night of the Living Dog
• s01e15 - Attack of the Movie Night!
• s01e16 - 98 Pound Cockroach
• s01e17 - When Nature Shrieks
• s01e18 - Vornicarn
• s01e19 - It Got Out of Hand
• s01e20 - The Sound of Fear
• s01e21 - The Sorry Syndrome
• s01e22 - Speak Not the Q Word
• s01e23 - Screaming Your Calls
• s01e24 - The Time-Out That Wouldn't End
• s01e25 - Curse of the Man-Beast
• s01e26 - It Came From Level Z
• s01e27 - Number Seven!
• s01e28 - The Friend Who Wasn't There
• s01e29 - Driven to Madness
• s01e30 - The Beast From 20,000 Gallons
• s01e31 - The Sneezing Horror
• s01e32 - Prisoner of the Dark Dimension
• s01e33 - I Predict Horror
• s01e34 - Destroy Chickie D!
• s01e35 - The Mystery of Dr. Cutter
• s01e36 - The Partymobile That Invaded Earth
• s01e37 - Ginormicat!
• s01e38 - My Monster, My Master
• s01e39 - It Came From Channel 5
• s01e40 - It Ruled With an Iron Fist
• s01e41 - This Ball Must Be Dodged
• s01e42 - It Spoke With Authority
• s01e43 - Debtor Alive!
• s01e44 - The Grade that Wouldn't Pass!
• s01e45 - You Can't Breathe in a Diner in Space!
• s01e46 - Race to the End... Zone!
• s01e47 - When Luck Runs Out
• s01e48 - That Which Cannot Be Unseen
• s01e49 - Bride of the Internet
• s01e50 - The Invisible Threat (Also Silent)

Monsters vs. Aliens Show Summary

Inspired by DreamWorks Animation's 2009 blockbuster feature film, this new series follows the further adventures of the beloved monsters- B.O.B., the gelatinous blob without a brain; Link, the prehistoric fish-man; Dr. Cockroach, the half-man/half-insect mad scientist; and Susan (aka Ginormica), the incredible growing woman-as they learn to adapt to a new world filled with bizarre aliens.