Watch NUMB3RS Season 4 Episode 18: When Worlds Collide

Season 6: Numb3rs: Clip 1 Trailer

An FBI special agent in Los Angeles teams with his mathematical genius brother to solve crimes. Don, a veteran investigator, relies on hard facts and evidence to catch crooks, while his younger brother Charlie, a brilliant university professor, analyzes mathematical equations and statistics to provide case clues. Sibling film directors Ridley and Tony S (more…)

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Season 4, Episode 18 When Worlds Collide

First Aired: May 16, 2008

In the fourth-season finale, one of Charlie's colleagues is arrested on suspicion of being linked to a terrorist group that may be planning an attack on local schools. While Charlie works to free his friend, his actions cause him and Don to confront their opposing beliefs in how the FBI conducts its business. Meanwhile, Megan resigns her position to concentrate on pursuing her education and to counsel women who are in prison.

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Guest Cast

Meera Simhan Asha Rafiq

Roman Mitichyan Kaleen Rafiq

Paul Vincent O'Connor Max Flaherty

Shawn Doyle Shane O'Hanahan

Kevin Symons CIA Officer

Nick Jaine Benjamin Rajar

Ravi Kapoor Phil Sanjrani

Željko Ivanek William Fraley

Tiya Sircar Shaza Rafiq

Cast & Details See all »

Premiered: January 23, 2005
Rating: TV-14
Premise: An FBI special agent in Los Angeles teams with his mathematical genius brother to solve crimes. Don, a veteran investigator, relies on hard facts and evidence to catch crooks, while his younger brother Charlie, a brilliant university professor, analyzes ma… (more)