Boom Boom! Basil Brush comes to the rescue of potential careless bathers in this COI (Central Office of Information) film, trading bad puns and banter with his erstwhile comic partner Roy North.

Basil was voiced and operated by Ivan Owen, a publicity-shy actor who remained anonymous during the puppets career and never gave interviews or allowed himself to be photographed. It has been reported that he modelled the voice on the comic actor Terry-Thomas. (Alex Davidson)