Overview: Darrell and her class return to Malory Towers. The first order of business: elect a new class leader. Gwen decides to take the new girl under her wing and become her best friend.
Overview: Alicia convinces Darrell to help her play a prank on their teachers with invisible chalk. Meanwhile, Mr. Parker becomes stricter with his teaching. Mary-Lou finds her voice and stands up for herself.
Overview: The girls attempt to make Ellen feel more included but their efforts backfire. Miss Grayling has a secret that might put Malory Towers in danger.
Overview: In an attempt to impress her parents, Gwen auditions for the lead role in the upcoming school play. Darrell and Sally devise a plan to save the school.
Overview: When Alicia’s birthday gift from her parents doesn’t arrive, she takes it out on her teachers. Gwen becomes more tangled in her lies.
Overview: Ellen is stressed that she’ll lose her scholarship and stays up all night studying for an exam. Gwen gets her hands on Darrell’s diary and discovers Darrell's secret.
Overview: Darrell shows a potential investor around Malory Towers. Gwen is confronted with her lies when her mother visits.
Overview: A teacher and Gwen are quarantined after finding out they have the measles. Darrell finds out disturbing news about the future of Malory Towers. Sally takes on extra responsibilities.
Overview: Alicia and Darrell pull a sneezing prank on their French teacher, which disappoints Sally. Someone has stolen important possessions from the girls.
Overview: Gwen resorts to drastic measures to hide what she’s stolen. Darrell and Sally find a clue that could finally lead them to Lady Jane Malory’s treasure.
Overview: Malory Towers competes with the local boys' school in a competition. Ellen suffers a panic attack when she is accused of Gwen's misdeeds.
Overview: The girls doubt Ellen’s innocence. Gwen attempts to get rid of the items she stole, endangering Mary-Lou in the process.
Overview: Miss Grayling reveals disheartening news. In one last attempt to save the school, Darrell and Sally try to find Lady Jane’s lost treasure. Gwen’s secrets come to light.