Complete story — includes the ending
An arsonist believed to be part of an extremist environmental group sets a fire at a car dealership that kills a salesman. The group's name is spray painted at the scene and is the fourth such fire, but the first to claim a life. Guest stars include Loren Dean and science educator and television presenter Bill Nye in his first appearance in the recurring role of Charlie's CalSci colleague engineering professor Bill Waldie. First appearance of: Sophina Brown as Bianca Styles, before she is cast as Nikki Betancourt in season five. Mathematics used: Combustion and principal components analysis
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Numbers season 2. HTML formatting and reference markers removed. · Content license