A SEAL lieutenant dies while he and his team rappel during an exercise to prepare for a classified operation; he falls to his death due to a failure of a fitting in his rappelling gear; Gibbs and company investigate; a special agent of the CIA expresses intense interest. The phony part is an inferior fitting, intended to fail, which someone substituted. A number of factors do not add up right. However, Ducky provides ice cream, and Kate does something she's never before done. Meanwhile Abby and McGee have some ups and downs, and they hack into a server and enter a secret e-mail account. Gibbs and the team eventually put the pieces together and reach a conclusion.
—DocRushing