Episode 301: Spree, Part 1 » In part 1 of 2, a 30-year-old Texas schoolteacher and her 17-year-old lover embark on a cross-country crime spree. When the pair hit L.A., their deeds turn deadly and it becomes clear that their actions are no longer random. Joining Don in the pursuit is Agent Edgerton. Elsewhere, Alan considers moving out of the house, and Amita tells Charlie her decision about whether or not she's moving to Boston. More » Math used: pursuit curves, M57 nebula, geodesics Episode 302: Spree, Part 2--Daughters In the conclusion, Megan is kidnapped and taken hostage by a disturbed woman who wants to exchange the FBI agent for her teen lover, who is in custody on homicide and robbery charges. During the hunt for Megan, Don goes to extraordinary lengths to find her and uses tactics that surprise even him. Helping Don in the investigation is agent Ian Edgerton. Also, Amita confronts Charlie over his coolness toward her. Math used: spirals, law of unintended consequences, trawler problem, bell curve (normal distribution), parametric equations Episode 303: Traffic » Don tries to determine whether a serial killer is responsible for seven attacks on the freeway that have claimed four lives and injured several others. Since different weapons, from rocks to rifles, were used each time, the attacks may be random, so Charlie works to uncover a pattern to the crimes. Back on campus, Charlie becomes concerned about why Larry insists on living in his office. More » Math used: linear Diophantine equations, quadratic discriminant analysis, craquelure, curvelet analysis Episode 304: Provenance A Pissarro painting insured for \$22 million is stolen from a museum, where it was on loan from a private collector, just weeks before it was to go on a major art tour. The investigation reveals the painting is suspected of being Nazi-looted art and that its current owner was recently involved in a lawsuit brought by a Holocaust survivor who claims her family owned the Pissarro before Nazis took it from them. Also, Alan worries that Charlie isn't being responsible about keeping up the house. Math used: steady motion algorithm, curtate cycloid, differential geometry, Oort cloud, facial symmetry, combinatorics Episode 305: The Mole A young woman who worked as an interpreter for the Chinese consulate is killed in an apparent hit-and-run accident, but Don believes she was murdered. The investigation reveals the victim had a large sum of cash in a bank account and may have been a spy. Also, Don fears the woman may have worked with a mole in the Department of Justice. Back on campus, Charlie becomes concerned when he learns that Larry collaborated on a published article with someone else. Math used: randomness, partial differential equations, traffic flow Episode 306: Longshot A young man is stabbed to death at a horse-racing track after successfully picking 30 winners in a row. A notebook with a sophisticated formula for placing bets is found near the body and Charlie tries to decipher it. Don soon learns that the track's owner has ties to organized crime. Also, Larry voices doubts about his relationship with Megan. Math used: parimutuel betting, probability, arbitrage betting, pick 6, baryogenesis, data mining