Ary Katz

Brennan and Booth investigate the death of a female roller derby skater whose body was dismembered. In order to get more answers, they enlist Angie to go undercover as a derby skater. Meanwhile, Cam tries to uncover the details behind Booth’s secretive hospital appointments.

Wendy and Hodges enlist a group of high school CSI cadets to help solve a real crime. Meanwhile, someone is determined to thwart the romance blossoming between Wendy and Henry.

Horatio takes point as the negotiator when an armed gunman storms CSI headquarters and takes hostages.

Joss testifies in Wilson's murder trial; April fears Lucy is growing up too fast; Karen's male nanny makes a move on her; Harry and Joss advance their relationship.

April realises how judgmental her mother is and makes a big decision. Marc decides to focus all his energy on his music. Lydia's behaviour becomes even more bizarre.

Karen is happy to be back working with her clients again, and April's new client gets a bit too close for comfort. Plus, someone from Marc's past becomes very present.