Jesse Burch

Bosco and his agents are gunned down within the walls of CBI headquarters. With two men dead and Bosco in a critical condition, Lisbon and her team race to find the perpetrator. As the investigation progresses, it becomes clear that notorious serial killer Red John is responsible - and he has an assistant inside the department.

Bosco and Lisbon reluctantly join forces to deal with a kidnapping case. When it seems as though the hostage has no chance of survival, Jane comes up with an unorthodox plan to save the victim's life but Bosco refuses to put it into action.

When Carrie discovers that the romantic line Doug used when they started dating was stolen, he tries to make up a new one for Valentine's Day.

Seth visits Dr Roberts in Seattle to ask for his daughter's hand in marriage, and Kaitlin realises she likes Will.

Horatio and the team race against time to find a killer who escaped from prison while helping to fight a fire in the Everglades; a local college student is found shot, but the blaze has destroyed the crime scene and evidence.

As Dre tries to keep the peace on Valentine's Day, the siblings try to teach Diane how to give compliments.