In this episode of Numb3rs a truck carrying radioactive material is stolen, and the thieves threaten to set off a dirty bomb in the city in 12 hours if they aren’t paid $20 million. While Don attempts to track down the truck, Charlie tries to come up with the most likely location where the bomb may be detonated to inflict the most damage to the population.
In this episode of Numb3rs the city is in a panic as a sniper goes on a shooting spree randomly killing several people, including a postal worker. The investigation reveals that more than one shooter is at work. As Charlie works the case, he gets really frustrated by a sniper expert Don brings in to help out.
A man wanted for stock fraud is found garroted in his apartment, and the crime is really similar to a murder committed a year earlier, a case in which Don closed when an ex-con confessed. Now, Don must re-investigate the old case to determine if he put an innocent man in jail or not. He asks Charlie to go over the evidence to see if anything was missed the first time around.
A strange series of robberies leads Don into a case involving counterfeit money, kidnapping, and murder. Don is aided by Secret Service agent Kim Hall while Charlie uses math to analyze fake bank notes and track their spread across circulation.
Don is investigating a series of train accidents which are recreations of previous wrecks. The saboteur leaves a note composed entirely of numbers.
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