While working on just a regular murder case with the rest of the NCIS team, Abby is almost killed by an evidence from the case and soon it becomes clear that the murder was staged, and that someone wants Abby dead. The team discovers some enemies from Abby's past, and they must find out who is the person, before the person kills Abby.
Guests: Happy Days star Marion Ross ("Where There's A Will") stops by. Plus the very talented australian born actress Radha Mitchell. Later, Graig welcomes 19 year old singing sensation, Erin Boheme to perform a song from her debut album "What Love Is."
The Unit enters the SERE (Survival, Evasion, Resistance Escape) training course and they are lead to believe that they will be guards. The group is soon shocked to discover that they are actually the POWs for an undetermined amount of time.