Triangle

Triangle (2009) is Christopher Smith's psychological horror, and you can watch it online on iFILM. Single mother Jess heads out to sea on a yacht with a handful of friends, unable to shake a creeping sense of dread.

A sudden storm flips the boat. The survivors are rescued by a vast ocean liner drifting empty: the clocks have stopped, the corridors are deserted. Only Jess feels she has stood here before. And somewhere on those decks, footsteps follow them. Melissa George carries the lead, with a young Liam Hemsworth at her side.

Smith engineered the film as a trap that folds in on itself, paying off your attention with an ending that turns everything inside out. Little blood, plenty of cold terror. It keeps landing on lists of the genre's smartest puzzle-box films. Stream Triangle (2009) online on iFILM.