While investigating the murder of a Naval Commander, the team undergo mandatory psychological evaluations with the sessions revealing personal issues within the team as well as a connection to a past incident that changed the team forever.
Guest star Scott Lawrence previously played the role of Cmdr. Sturgis Turner on JAG, NCIS's parent series.
In the background of the last scene where Kate is talking to her sister on the phone, McGee can be seen sitting down at a computer and Tony is looking out of a window. This is from the season one episode, Dead Man Talking (episode) where the three of them are on a stakeout. In the same episode, she receives a call from a "Dwayne" and answers it in the same way, showing McGee and Tony in the background.
NCIS Special Agent and also Dr. Cranston's younger sister. Once part of the Secret Service Presidential Protection Detail, she later joined the NCIS team up and began her career which lasted up for a year and a half. However, it all ended in tragedy when in the last few seconds of the Season 2 finale, Twilight (episode), she died after being shot in the head by an old enemy of the team. It is revealed in the DVD commentary for this episode that Sasha Alexander came back to use her current voice during the phone call with her sister.