Numb3rs: Trust Metric

"Trust Metric" is the season premiere of the fourth season of the American television show Numb3rs. Written by series writer Ken Sanzel, "Trust Metric" is set five weeks after the events in "The Janus List". In "Trust Metric"'s story, a Federal Bureau of Investigation (FBI) team attempts to find a pair of double agents, one of them a former teammate, who have escaped from prison. The story continues the events that began in "The Janus List". The episode also marks the television directorial debut of series executive producer and filmmaker Tony Scott. He made several changes to the sets, to the actors' hair, and to the filming of the episode. Because of Scott's involvement, Sanzel broke with the normal number of action scenes and included more scenes in the episode. Scott also brought in Val Kilmer as a guest star. "Trust Metric" first aired in the United States on September 28, 2007. Critics gave the episode positive reviews. They especially liked the cinematic feel of the episode. A special feature on the Numb3rs season four DVDs highlight the filming of the episode.