Clarissa Explains It All - Season 1 - Eps 5: New Addition
Using her deductive powers, Clarissa determines that her parents are having a baby. She orchestrates a series of demonstrations to try to dissuade them, only to discover they're actually adding a new room on to the house.
About Clarissa Explains It All

Title: Clarissa Explains It All
First Air Date: 1991-03-23
Last Air Date: 1994-10-01
Status: Ended
Rating: 7.8/10 (from 152 votes)
Language: EN
Seasons: 5
Total Episodes: 65
Network: Nickelodeon
Genres: Comedy, Kids, Family
Production Companies: Thunder Pictures, Nickelodeon Productions
Synopsis
Clarissa Darling is a teen girl dealing with typical pre-adolescent concerns such as school, boys, pimples, wearing her first training bra and an annoying little brother Ferguson.
Cast

Melissa Joan Hart
Clarissa Darling

Jason Zimbler
Ferguson Darling

Elizabeth Hess
Janet Darling

Joe O'Connor
Marshall Darling

Sean O'Neal
Sam Anders