Numb3rs: Season 4

Don, Charlie and the team must track down a traitorous agent, who has escaped from FBI custody.

Don and his team look into the murder of a young woman in an up-and-coming actor's Hollywood Hills mansion.

A car crash into a building has ties to street racing and possibly a cold case.

Charlie is uncomfortable when the team has to use a numerologist to solve the current case, that has religious overtones.

The perfect bank heist almost stumps the team when the profits are donated or returned to their rightful owners, and Don struggles with management issues.

Don feels responsible when a woman in the Witness Protection Program is gunned down in her home. Charlie sets out to prove he wasn't responsible.

Amita's life is put in danger when she consults on a case involving an on-line role-playing game.

A wealthy man's daughter is kidnapped, and Megan is astounded by his behavior while the team tries to rescue her.

A comic book convention becomes a crime scene when a deadly robbery leads to the disappearance of an extremely rare comic book.

David is held hostage in an elevator at the F.B.I. building, and Don keeps brushing aside Charlie's suggestion to save David as an all-out assault is planned.

Charlie's life is put in danger after he gives an interview about the case he and Don are working on together, attracting the attention of the kidnappers of an investigative reporter.

Don's team tracks a serial rapist who uses his position as a cop to entrap his victims.

During a bust of an inner city meth lab, Don's instinct leads to the arrest of a bystander who may have a greater scheme planned.

A.U.S.A. Robin Brooks is back in town, and her involvement in Don's case brings back memories as they try to keep witnesses alive. Meanwhile, David attempts to bond with a young man who's in the chief suspect's thrall.

Clay Porter returns to the U.S. when his father and sister are taken hostage, and Don embarks on a deadly cat-and-mouse game to try to catch Porter and rescue his family.

Larry finds himself fighting his own bigotry when he assists Don and Charlie's investigation into the poisoning of cult members.

The murder of a rapper puts Charlie to work analyzing the mathematics of the music business in the same week that Amita's parents come to town, and Megan has asked for a week off without discussing it with Don.

When one of Charlie's friends, a scientist at the university, is arrested for terrorist activities, it puts him at philosophical odds with Don. And as he works to prove the man's innocence, his beliefs may jeopardize his career.