Bill Waldie

Bill Waldie (Bill Nye) is a close colleague of Dr. Charlie Eppes who teams up with the mathematicians in some of their most elaborately scholarly cases for consultation.

Numb3rs Season 2
Bill Waldie appears in the episode Scorched.

Numb3rs Season 3
Bill appears in the episode Hardball.

Numb3rs Season 4
Dr. Waldie's final appearance is in the episode End Game.