1. Trust Metric
After the events of "The Janus List," Colby escapes from custody. Don and the team go after him, but everything may not be as it seems.
Numb3rs — Season 4
2. Hollywood Homicide
An actor on his way to stardom finds himself in the middle of a murder investigation when a young woman is murdered in his house.
3. Velocity
When a car crashes into a busy coffee shop, the team discovers the fatal act might not have been an accident.
4. Thirteen
Don, Charlie, and the team attempt to stop a serial killer who is seemingly obsessed with people resembling Biblical figures.
5. Robin Hood
Robberies the storybook hero would have been proud to claim plague Don and Charlie as they attempt to catch a do-good thief who is donating his spoils to charity.
6. In Security
Don feels responsible for a life lost. The victim was in the Witness Protection Program, but she wasn't the only one keeping secrets...what is Don hiding?
7. Primacy
When a man is found dead, the team enters the world of alternate reality gaming. However, their investigation leads to a danger for a loved one.
8. Tabu
When a wealthy heiress is kidnapped, Don and the team race against the clock in hopes to find her. However, the motivations behind her disappearance aren't what they seem.
9. Graphic
The team investigates the theft of a graphic comic book.
10. Chinese Box
Don and the team are left with little recourse when a former FBI subcontractor takes a team member hostage.
11. Breaking Point
Charlie's life is put in danger when Don brings him in on the case of a missing reporter.
12. Power
A bad case becomes worse when Don and the team must pursue a police officer believed to have committed unspeakable crimes.
13. Black Swan
Don and the team bust a meth lab, but when Don has a feeling there's more to the organization than just what's on the surface, his intuition is put to the test.
14. Checkmate
Don runs into Robin Brooks during an investigation concerning informants and a chess master.
15. End Game
Don and his team hunt for an ex-Marine wanted for murder. Things become confusing, however, when the Marine's family is kidnapped. Is there more to this case than meets the eye?
16. Atomic No. 33
Don and the team must investigate a religious cult after scores of followers are poisoned.
17. Pay to Play
When a musician is murdered, Don and his team must race to find the culprits. They need Charlie's help, but he is busy with Amita's parents coming for a visit.
18. When World's Collide
In the season finale, Don and Charlie work together on a case that ends up with them going head to head about their personal beliefs, and one team member will walk away forever.