Tau is a 2018 science fiction thriller film directed by Federico D'Alessandro from a screenplay by Noga Landau.

A multinational collaborative project between the United States, Canada, Serbia, and the Czech Republic, the film stars Maika Monroe, Ed Skrein, and Gary Oldman in the main roles, and was released on June 28, 2018, by Netflix, to generally negative reviews.

After multiple sessions of psychological torture by a man named Alex, she destroys the cell and adjacent lab in an escape attempt.

The two other subjects are killed by a robot, Aries, run by an artificial intelligence (AI) named Tau.

In the face of a two-week deadline, Alex keeps Julia a prisoner in his house and insists that she complete puzzles and cognitive tests.

Julia secretly accesses Alex's tablet computer and discovers that ten subjects have died in his experiments.

When Alex returns later that night from a charity benefit, Julia begins to seduce him while he is sitting at the kitchen table, then slashes him.

The disconnected drone, still containing Tau's former consciousness and memories, helps Julia break free from her restraints.