Numb3rs Season 3 Episode 20 Burn Rate

Charlie and the FBI investigate a string of arson fires that appear to be targeting National Forests. Their investigation leads them to a group of environmental activists who claim responsibility for the fires, but they vehemently deny any involvement in the latest one, which led to the death of several firefighters. Meanwhile, Amita tries to find a way to fund her math program and finds an unlikely donor in a student who is looking to launder his gambling winnings. As tensions mount between the FBI and the activists, Charlie must use his math skills to uncover the truth behind the fires and avoid further tragedy.