In the beginning, after Jason gets off the train, there is a shot of Jason outside at night looking up a snow-covered street with some footprints in the snow leading away from him. These footprints belong to director Doug Liman.

This film highlights Franka Potente's trademark for having her hair dyed a lot in her films. In fact, she sometimes shaves her head after a film in order to let it grow back normally, as it gets dyed so often.

In the final scene at the scooter shop, look at the hanging plant behind Marie. The red bank bag used throughout the movie is the pot.

The motel/hotel in Paris, where Matt Damon and Franka Potente are spending some nights is called "Hôtel de la paix" ("Peace Hotel"). The right spot for a spy and his companion in deep trouble, isn't it?