A man takes hostages, including Joan, and threatens to execute them unless Holmes finds the person responsible for the death of his son.
After a teen uses a rifle to stop an assault on his mother, he learns the perpetrator of the assault is someone he knows.
A man under investigation for rape and murder threatens to expose the secrets of those who are working on the case.
When warring rebel groups threaten Somali food relief efforts and kidnap an American aide, Elizabeth considers asking a notorious Russian arms dealer for help; Henry is taken off the VFF doomsday cult case.