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Episode guide

S4·E18 When World's Collide

Core Aired May 16, 2008 42 min ★ 8.7/10 · 3 TMDB votes
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Synopsis

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.

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Frequently Asked Questions

When did Season 4 Episode 18 of Numb3rs air?

Season 4, Episode 18 ('When World's Collide') originally aired on May 16, 2008.

How long is Season 4 Episode 18 ('When World's Collide')?

The runtime for this episode is approximately 42 minutes.

What happens in Numb3rs Season 4 Episode 18?

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....

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