The Girl from U.N.C.L.E. - Season 1 Episode 5 The Montori Device Affair

UNCLE headquarters in Rome is raided by Thrush agents who swipe a small, jewel-like device called a Montori. The Montori allows UNCLE agents to listen in on any UNCLE channels, even scrambled ones. Waverly orders all communications at UNCLE to cease until the device is recovered. With six world leaders coming together for a top-secret conference, Waverly believes Thrush intends to create chaos at the meeting. Without communications, Waverly is unable to warn the world leaders of the probable danger. April and Mark must find the device.