Trivia

As the Earth heats up, Bill McGuire asks for information on the melting point of "everything from steel to my glass eye". Leo McKern had a glass eye.

The realistic newspaper footage was shot in the Fleet Street offices of Express Newspapers, and gives a vivid picture of London's old press center. Most British newspapers have since moved from Fleet Street. "Express" editor Arthur Christiansen plays himself.

The scenes of the "Met Office" were filmed outside and inside the Ministry of Defence main building in Whitehall. This access was remarkable. Those interiors were little changed, until refurbishment after 2000.

Jeannie struggles with a Roneo stencil duplicator in an early scene, saying it is "over-inking". Roneo threatened to sue the producers for potential damage to their reputation.

This movie received an "X" certificate from the British Board of Film Censors upon release because of Janet Munro's topless scene, barring anyone under 16 from seeing it.

Michael Caine: the police officer Peter stops to talk to toward the end, while driving to Jeannie's apartment.