Her aggressive attitude towards harmless pensioners finally gets her into trouble with the police and she's forced to attend anger-management classes.
The course leader has some issues of his own though that have been buried until now. As they're in danger of bubbling up to the surface, how will Nan fit into his anger?
Meanwhile, Jamie joins forces with Nan's kindly new neighbour to raise funds for the local zoo, with somewhat dramatic results.
Catherine Tate's Nan, BBC1, 10.25pm
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