The potential downsides to mucking about with the space-time continuum.
The ten best London apocalypses on film
The big smoke lives up to its name as it faces annihilation in these disaster movies
London has taken a hammering in the movies this summer, besieged by blue-goo aliens in 'The World's End' and bombed to smithereens in 'GI Joe: Retaliation' and 'Star Trek into Darkness'. That's nothing new – over the years movies have hurled their fair share of mayhem at our fragile little city.
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From Johnny Depp to Ryan Gosling, when actors swap trousers and shirts for blouses and skirts.
Many actors have sung or played instruments for real in the movies. But do they actually cut it as musos?
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