Capt. Strand (Rob Lowe) and his team rally together when one of their own is trapped in the aftermath of a building explosion in the season finale "A Bright and Cloudless Morning." The incident prompts Owen to reflect on his experience on the day of the 9/11 terrorist attacks. Meanwhile, Tommy and Julius (Gina Torres, guest star Nathan Owens) consider their future, and T.K. and Carlos (Ronen Rubinstein, Rafael Silva) come to an important decision. Jackson Pace also guest stars.