How police kept track of the Trekkies: Met drew up secret dossier into Star Trek and The X-Files

Star Trek and The X-Files were among science-fiction TV shows monitored by Scotland Yard over fears they posed a potential threat to national security, it was revealed yesterday.

Nineties TV shows Dark Skies, Roswell, Millennium and the film Lawnmower Man were also watched by the Metropolitan Police Special Branch, according to newly-released files.

Police were concerned British fans of the US shows would kill themselves or turn against society, while they also kept tabs on the shows to protect the country from rioting and cyber-attacks.