The scene in the film Sliding Doors (1998) starring Gwyneth Paltrow features the Waterloo and City Line train, although the announcement seems to suggest that it is the District Line station Embankment
There was a driverless Royal Mail train running between Paddington and Whitechapel (called Mail Rail) deep underground, which was closed down in 2003. Visit www.mailrail.co.uk for more details
Scientists used London Underground for experiments on the spread of germ spores in 1963, and detected it 10 miles away on the Northern Line three days later. No wonder people catch cold on the Tube so easily.
