Science Sibling Rivalry

"Science Sibling Rivalry" is the second segment of the twelfth episode of Season 1. It premiered on ABC in the United States on February 21, 1998.
==Synopsis==
Lark and Mark bicker with each other over how their science project for the school should turn out, so Spencer tries to assist them and keep them in control.
==Plot==
TBA.
Category:Episodes
Category:Season 1