Plot summary
Don learns that someone is poisoning non-prescription drugs made by a leading pharmaceutical company after four people nearly die from the tampering. Guest stars include Lou Diamond Phillips in the recurring role of FBI fugitive tracker and sniper Ian Edgerton, as well as Connor Trinneer and Cynthia Preston. Mathematics used: Information theory - information entropy, graph theory - Seven Bridges of Königsberg and soap bubble theory with Steiner tree
Credits
Adapted from Wikipedia contributors, Numbers season 2. HTML formatting and reference markers removed.