Catherine Kamei

The team strives to help an injured former Secret Service agent regain his memory in a desperate bid stop a weapon of mass destruction from launching.

Doctor Cyril Taft experiences the rush of an NCIS case after he is assigned surgical duty to Gibbs's suspect and finds key evidence. Also, DiNozzo pays Jeanne Benoit a visit as he chases a lead involving doctors in Sudan.

The situation grows complicated as Mason Treadwell delves further into Emily's past. Kara's worsening state draws the attention of the Graysons.

The optimism of a young leukaemia patient inspires James to become a better person; James confesses his feelings for Zoe, while Julianna's Christmas visit with Walter reveals the strain of their long-distance marriage.

A recently released arsonist becomes the prime suspect in a fire that killed a fire chief when it is determined his past technique was used.

Billie hires a baby nurse without consulting Zack; Davis and Ryan face a difficult choice when they learn surprising news about the nurse.