What does a train car have in common with a bomb and some serious hazardous material?
The answer was at the center of NCIS: Los Angeles Season 5 Episode 7, as hundreds of thousands of people stared death in the case and Callen, Hanna and company were forced to act very quickly.
Overall, "The Livelong Day" was an investigation-focused episode that centered on identifying and then tracking down the culprits involved.
Did you miss it? Have no worries. Just click on the following photo to watch the full installment now: