Episode 44 of "Numb3rs"
s03e07 Blackout
Title: Blackout
Original Air Date: 11/03/2006 on CBS
Plot Outline:
When a series of blackouts occur in power stations leaving Los Angeles in the dark, Don and his team must determine if it is an accident or the work of terrorists. When Charlie and Larry's first mathematic analysis of the crime proves to be wrong, they take a deeper look into the blackouts and uncover important clues. Meanwhile, the sparks begin to fly between Don and his former trainee, special agent Warner.