Season 4

The fourth season of Numb3rs, an American television series premiered on CBS on September 28, 2007 and concluded on May 16, 2008, with the consists of 18 episodes.

Summary
As this season starts, Colby Granger escapes from jail, and is revealed to be a triple agent. He then rejoins the team. Don and Liz break up halfway through this season, after Liz has trouble with Don's trust issues. Amita's parents come to visit, which becomes a secondary theme throughout most of the season. Due to her work at the DOJ, Megan is conflicted by her work, and turns to Larry for help. Near the end of the season, Don's girlfriend from season two, Robin Brooks, returns. Don and Robin then continue their relationship. Charlie attends FBI training camp because he has been working with Don for several years and wants to better understand what his brother does. In the season finale, Megan leaves the team to move back to Washington, DC, and Charlie goes head-to-head with Don about a case. This causes Charlie to send information to scientists in Pakistan. He is subsequently arrested and has his security clearance revoked, so he can no longer help Don on cases. At the end of the episode, Don drives away to another case and Charlie admits that giving up FBI work will be harder than he expected.

Main Cast

 * Rob Morrow as Don Eppes
 * David Krumholtz as Charlie Eppes
 * Judd Hirsch as Alan Eppes
 * Alimi Ballard as David Sinclair
 * Peter MacNicol as Larry Fleinhardt
 * Diane Farr as Megan Reeves
 * Navi Rawat as Amita Ramanujan
 * Dylan Bruno as Colby Granger

Recurring Cast

 * Aya Sumika as Liz Warner