Five-0 investigates the murder of a bounty hunter who was killed after he apprehended a fugitive. Meanwhile, Rachel reveals a long-held secret to Danny that has serious ramifications.
Marco confronts an old enemy. Later, Frye gets a proposition from the DEA.
Marco gains a new ally. Meanwhile, Charlotte and Ray discuss their future.
Sonya meets a man connected to her past in the Season 2 premiere. Meanwhile, Marco questions his safety.
Sonya and Marco try their best to get important information out of a scared young witness; information that will help them learn the identity of The Beast. Meanwhile, Charlotte contacts a friend from her past to help her with her tunnel situation, Daniel and Adriana do a little sleuthing of their own and Marco learns more about Hank's past and the tragic history he and Sonya share.moreless
Walt looks into the death of a shepherd and his dog in Absaroka's Basque community. Branch has thrown in with Jacob Nighthorse who is contributing to his campaign. Cady goes to Detective Fales for information about her mother's death.moreless
A "haunted" video seems to have scared a young woman to death and now Castle is convinced he's next after inadvertently watching the cursed video.
Booth and Brennan investigate how a crime-scene cleaner's body washed to shore inside a sealed pod. Back at the lab, Angela and Hodgins discover Cam's been keeping a secret.
A fire reveals a longstanding family feud and brings Munroe face-to-face with his past. Meanwhile, Nick has to keep everything from going up in flames.