Numb3rs

S02E21

Rampage

When an assailant opens fire in the FBI offices, Don and his team must determine his motive and possible connection to a dangerous arms dealer who is on trial. After nearly getting shot, Charlie is shaken and reluctant to return to the offices, which hinders his contribution to the case.

• Directed by J. Miller Tobin
• Written by Ken Sanzel

S02E22

Backscatter

An FBI investigation into a computer hacking scam that taps into a bank's system to gain access to the identities and financial assets of its customers becomes personal for Don and the Eppes family.

• Directed by Bill Eagles
• Written by Nicolas Falacci, Cheryl Heuton

S01E07

Counterfeit Reality

Don learns that counterfeiters are at work producing small-denomination bills, and that they have taken an artist hostage to draw the images for the fake money. If the missing woman isn't located soon, Don fears that she will be killed when her work is finished on the phony cash. The counterfeiters have already murdered at least five people, two of whom stole money from them. The case is made more difficult for Don when his former lover, now a Secret Service agent, is assigned to it.

• Directed by Alex Zakrzewski
• Written by Andrew Dettmann

S02E19

Dark Matter

Don and his team investigate a school shooting. He learns two students could have a strong motive, so Charlie uses the school's radio frequency identification system to track the shooters' movements through the school's hallways. When Charlie detects an abnormal pattern, the agents take a look at the evidence and discover a third participant no one had suspected earlier.

• Directed by Peter Ellis
• Written by Don McGill

S01E06

Sabotage

While consulting with the NTSB at the scene of the wreck, Don learns that this tragedy is one of a series of recreated accidents involving railroad negligence. As is the pattern with the previous train wrecks, an undecipherable numerical code is left at the site, which Don recruits Charlie to solve. By breaking the code, Charlie is able to establish that this accident was a recreation of a deadly wreck that left only one survivor several years ago. Don's investigation leads him and his team to a dangerous standoff with their suspect, who has surprising ties to the railway system.

• Directed by Lou Antonio
• Written by Liz Friedman

S01E09

Sniper Zero

The city is in a panic as a sniper goes on a shooting spree and randomly kills several people, including a postal worker. The investigation reveals that more than one shooter is at work. As Charlie works the case, he's frustrated by a sniper expert Don brings in to help out.

• Directed by J. Miller Tobin
• Written by Ken Sanzel

S06E16

Cause and Effect

• Directed by Nicolas Falacci
• Written by Nicolas Falacci, Cheryl Heuton

S06E15

Growin' Up

• Directed by Rob Morrow
• Written by Robert Port

S06E14

And the Winner Is...

• Directed by Ralph Hemecker
• Written by Gary Rieck

S06E13

Devil Girl

• Directed by Stephen Gyllenhaal
• Written by Julie Hébert

S06E12

Arm in Arms

• Directed by Gwyneth Horder-Payton
• Written by Andrew Dettmann

S06E11

Scratch

• Directed by Stephen Gyllenhaal
• Written by Mary Leah Sutton