The Simpsons: Before Season 1

The Simpsons: Before Season 1 is a spinoff/prequel to The Simpsons. It takes place before The Simpsons first season.

Seasons:
There are 21684626726716718686586851465165168 Seasons.

Differences:
there are only a few differences. These are:
 * Santa's Little Helper is not a character
 * The original Snowball is the Simpsons's family pet (In the series finale, she is killed off and replaced with Snowball II by Homer)

Homer/Snowball relationship
Homer is constantly attacked and scratched by Snowball. Homer admits to the Family in the finale that he only kept the cat for Lisa, which the family replies they knew the day Homer got her.