The first season of the TV version of the hit movie reassembled a good chunk of the movie's cast, plus the movie's director Amy Heckerling as executive producer. So why was it such a pale imitation? Two words: Rachel Blanchard.
Blanchard took over as lead character Cher from Alicia Silverstone (who understandably had other things to do at the time). Though Blanchard was physically right for the role, her flat performance makes you realize how perfect Silverstone really was for the role, with her fizzy, lighthearted, charismatic performance. Blanchard, by contrast, was dull as dishwater, with no spunk or charisma or anything. She pulled the whole series down. They should have hired Christine Taylor (Marcia in "The Brady Bunch" movies) instead.
The second season got even worse. Moving to a smaller network (from ABC to UPN) necessitated budget cuts, so Heckerling was gone as well as movie vets Wallace Shawn and Twink Caplan. "Very special episodes" started to creep in as well. Ugh.
Skip this one and rent the movie again instead.