Struggling against solving the mysterious cases that took place in Los Angeles, as they follow each small detail, Callen and Sam, do their best, in order to survive after being trapped by terrorists who seek to make a horrible attack on the submarine, the thing that leads all the group to do their best to save their lives and stop that attack.
Overall, it was an enjoyable episode. Sam and Callen showcased their amazing partnership and willingness to sacrifice themselves for the greater good, while never giving up. Their perseverance is what has made them successful throughout the years.
