When a Marine photographer disappears prior to providing testimony to an army court-martial hearing, the NCIS team must investigate both the murder he witnessed and a current project centred on military veterans who are homeless in the DC area.

In order to find a group of jewel thieves, Lisbon must channel her inner Patrick, who is too sick to investigate.

A young family is terrorised by a new Wesen, and Captain Renard receives an unexpected guest. Meanwhile, Diana shares new information with Monroe and Rosalee, and Eve seeks answers.

Callen goes undercover at a prestigious high school to track down a teenaged hacker who is compromising missions.

Charlie contacts Sam and Dean after she finds the book of the dead -- which could help eliminate the mark of Cain; Castiel and Metatron look for Castiel's grace.

Supergirl battles with Master Jailer, who is tracking and killing escaped Fort Rozz prisoners. Cat hires an additional assistant, who tries to one-up Kara, and James and Kara fail to agree on the DEO's methods.

Mac travels to Nevada to surprise his girlfriend Christine, but when he discovers she is missing, he asks the Las Vegas team for help.

Moretti tracks down a kidnapper; Pierce and Moretti find out that there may be a child who needs their help; Donnie considers buying a house in the suburbs.

Two men are found dead with a common feature, both have been killed using unconventional methods; $1 million anonymous checks are left around the city by someone known as the Guardian Angel.

The team's search for a serial killer becomes complicated when they realise they may actually be looking for a couple.

The team is called in when an up-and-coming executive at an upscale clothing company is abducted from a taxi after attending a rooftop party in Manhattan. Meanwhile, Clark Medina (recurring guest star Steven Weber) continues to make his presence known as new head of the Missing Persons Squad.