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Summary
When Tony opens a mysterious letter thinking it's for him, a small puff of white powder comes out and it releases a possible deadly virus. Kate calls for help and soon she and Tony are isolated in a bio-hazard isolation room for precausion. McGee and Gibbs work to discover who sent the envelope and how to cure their friends before its too late for them. Meanwhile, Tony's health gets worse...
Episode Guide
Season 01
Season 02
Season 03
Season 04
Season 05
Season 06
Season 07
Season 08
Season 09
Season 10
Season 11
Season 12
Season 13
Season 14
Season 15
Season 16
Season 17
Season 18
Season 19