The team must ascertain who is lying, the wife or the mistress, after the women accuse each other of murdering a navy public affairs officer.
The CBI team launch an investigation into the National Society of Authentic Santas when one of its members is found murdered.
Korsak tries to help an old friend fulfil his dying wish: to finally solve the deaths of his wife and daughter in a house fire some 15 years earlier.
Alison believes her relationship with Eddie needs a boost, so Eddie brings her to a remake of Romeo and Juliet. Jessica tries to become the leader of a jury when she is summoned for duty. Evan and Emery have trouble raising a digital pet.
Hanna achieves unwanted fame as the daughter of a murder suspect; "A" continues to manipulate Toby; Ezra hopes Aria can help him with his troubles; a Western-themed school dance becomes a battleground.