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Tucker, his little sister Rhona, and Mrs. Jenkins attend a relative's wedding, but cannot understand Mr. Jenkins absence until they return home.

While Tucker searches for Barry, he receives news about his school application. Alan gets rejected then considers making changes.

Tucker spends a day looking after Rhona. After an adventurous trip to the swimming pool, they have a surprise waiting for them at home.

Tucker and Rhona have mixed feelings after Barry moves in. More than one Jenkins finds a job, but no one is left to take care of Rhona. Natalia pays Tucker back for missing an earlier date.

With everyone working, there's no one to watch Rhona. She begins to feel like she's a burden.

Rhona is missing and everyone gets involved in the search.

The differences in Tucker and Natalia's social backgrounds are affecting their relationships with each other and their friends. Mrs. Jenkins goes to see a lawyer.

Tucker finally sees the true side of Natalia and Mr. Choudhury. Alan has news for both Barry and Tucker.

Tucker finds it difficult to work on his O levels, stay on the dole, and help Barry look for his car. Meanwhile, Tucker faces losing one old Grange Hill friend while another reenters his life.