One Hour To Zero is a 1976 British film directed by Jeremy Summers and starring Andrew Ashby, Jayne Collins and Toby Brige.

While the two children are lost, Steve's father returns to his place of work – the power station – in an attempt to correct the cooling fault, and prevent the disaster.

The Monthly Film Bulletin wrote: "Passing up the chance to treat a topical subject as anything more than a predictable domestic drama, One Hour to Zero uses the threat of an exploding nuclear power station strictly as background material.

The station, represented as a lurid pasteboard control room, would have been more at home in an old-fashioned strip-cartoon; and the major emergency is depicted as a rural incident worthy of a few police road blocks, a single helicopter and a vague professor with two assistants puzzling over why the experiment went wrong.

Rather than dealing, however tangentially, with the implications of a nuclear disaster, the movie has the self-satisfied Paul give the vaguely delinquent Steve (complete with archaic short-backand-sides haircut) a stiff dose of CFF advice about the selfishness of his running away and causing everyone so much trouble.