When a Navy captain is found dead and dressed in a strange costume under his uniform, the NCIS team comes upon a secret society consisting of real-life superheroes.The team work to get to the bottom of it, with the help of Tony's ex-fiancée.
Patrick Jane may be reinstated with the CBI, but Lisbon is on suspension and Cho, Rigsby and van Pelt have been reassigned. Now Jane must use his talents to get the old team back together, and does so by pitting them against his new team to be first to solve the murder of a fitness trainer.
Castle and Beckett investigate what seems to be an intelligence operative's assassination, and Beckett's connection with Demming strains her relationship with Castle.
In one night, the team investigate three cases which seem to be unrelated to one another.
Betty has a series of frightful experiences on Halloween, including dealing with her growing attraction to Henry (Christopher Gorham); Daniel visits his mum (Judith Light) in rehab.