Great episode! All the characters, London, Nia, Zack and Cody as well as Bob start their first day of high school and everyone gets into a load of trouble. Great episode and a mischievous one indeed.
However, I must say London's character has gone all wrong, just horrible, since the "Sink or Swim" episode of Season 3. She's just plain dumb, no emotions behind anything and just not funny anymore. Its sad, because she once was extremely funny and a person we could connect with and feel sympathy
Apart from London, this episode is awesome