Alien couch gag

The Alien couch gag is the fourth couch gag of Season 3.

Plot
An Alien is seen on the family couch. When he sees the family is coming, he pulls a string and jumps down a hatch. The family than sit normally, never noticing the Alien.

Character Appearances

 * Homer Simpson
 * Marge Simpson
 * Bart Simpson
 * Lisa Simpson
 * Maggie Simpson
 * Alien (couch)