Dimitrius goes undercover to infiltrate an arms-smuggling ring following reports that weapons are being sold on the black market. Away from operations, Meanwhile, Dimitrius' wife has some unexpected news to deliver

The murder of a man connected to the smuggling of Turkish relics sends Castle and Beckett on a quest to find a stolen antique believed to be Aladdin's lamp, in the hopes that it can lead them to the killer

Carrie gets caught up in a hostage situation at a soiree when a cybercriminal takes control of a lift and traps Eliot, the mayor and a wealthy businessman inside. With the computer whizz threatening to send them to their deaths if his demands aren't met, Carrie teams up with Jo to try to get a message to Al outside the building

Flashbacks reveal how Mary came to join Witsec as a break-in threatens the security of the first witnesses she and Marshall handled together back in 2003. Starring Mary McCormack and Frederick Weller, with a guest appearance by Allison Janney (The West Wing)

An uplifting round-up of good news stories from the UK and around the world.