NCIS Season 3 Episode 7

Six year-old Zach Tanner calls NCIS after witnessing the kidnapping of his dad, brilliant computer expert US Navy lieutenant commander Alex Tanner. Jethro can barely prevent Zach from being kidnapped, quite possibly to use as leverage to make his dad cooperate. His father is the only key to a superior cryptography program stolen from the firm he was detailed to. this program could compromise national security, so all agencies claim jurisdiction. Zach keeps amusing and surprising the team, which explores various theories and suspects, including Tanner, his best mate, commander Harry Wilder, and the firm's executive Frank Connell.