Plot summary
In the wake of a deadly standoff with a mysterious, yet brilliant bomber, Don and Charlie discover that he was poisoned to keep him from exposing a secret while the team are left reeling and stunned after learning that one of their own is a traitor, a revelation that threatens to change the team forever... Martin Jarvis, Shawn Hatosy, and James Frain guest star. Mathematics used: Merkle-Hellman, Wheat and Chessboard Problem, straddling checkerboard, substitution cipher, Bacon's cipher, knapsack problem and Lorentz force
Credits
Adapted from Wikipedia contributors, Numbers season 3. HTML formatting and reference markers removed.