18-th episode of 4-th season "Numb3rs"

What "Numb3rs" 18-th episode about

In the season finale, Don and Charlie work together on a case that ends up with them going head to head about their personal beliefs, and one team member will walk away forever.

Episode number: 18

Episode name: "When Worlds Collide"

Episode release date: 17 may 2008 at 02:00

Status: aired

Rating: 8.1

Last season episode