With nods to cult British horror Death Line and John Landis's An American Werewolf in London, Christopher Smith's debut feature is an entertaining ghost-train ride through subterranean hazards and hidden laboratory terrors. A late journey on the London Underground turns into a nightmare for a chic PR girl (played by Run Lola Run's Franka Potente) when she falls asleep on a platform and finds herself trapped underground. An attempted rape sends her further into the dank, dark tunnels where something even more dangerous and monstrous lurks. Tautly directed by Smith and well-anchored by a barnstorming turn from Potente, this often brutal tale of Tube terror does exactly what it's meant to: creep you out with sudden shocks, eerie atmospherics and gory thrills.

Trapped in a London subway station, a woman who's being pursued by a potential attacker heads into the unknown labyrinth of tunnels beneath the city's streets