Wire Service - Season 1 Episode 31 The Last Laugh

For an April Fool's day prank in Lisbon, Kate's fellow foreign correspondents work out an elaborate plot with men posing as spies, and a mysterious box that must reach an official in Tangiers. She's soon set wise to the plot, but goes through with it in the spirit of fun, but jewel thieves are also on to the plot, and switch the box with their own.