Season 4 Episode 18 – When Worlds Collide
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.
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.
When a musician is murdered, Don and his team must race to find the culprits. They need Charlie\'s help, but he is busy with Amita\'s parents coming for a visit.
Don and the team must investigate a religious cult after scores of followers are poisoned.
Don and his team investigate the kidnapping of the family of a Marine. Turns out, however, that the Marine is running from the law. A chicken-and-egg hunt ensues when the FBI searches for the fugitive Marine who is searching for his family.
Don runs into Robin Brooks during an investigation concerning informants and a chess master.
Don and the team bust a meth lab, but when Don has a feeling there\'s more to the organization than just what\'s on the surface, his intuition is put to the test.
A bad case becomes worse when Don and the team must pursue a police officer believed to have committed unspeakable crimes.
Charlie\'s life is put in danger when Don brings him in on the case of a missing reporter.
Don and the team are left with little recourse when a former FBI subcontractor takes a team member hostage.