Henry is chosen as one of the entries for the Brainbox of the Year competition, Peter stays with Great-Aunt Greta, while Mum and Dad go on a Great Escape out of Ashton.
Where to Watch Horrid Henry's Wild Weekend
Cast of Horrid Henry's Wild Weekend
Lizzie WaterworthHenry (voice)
Tamsin HeatleyHenry's Mum (voice)
Wayne ForesterHenry's Dad (voice)
Emma TatePerfect Peter (voice)
Aidan Cook
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