Conspiracy (episode)

After Captain Picard receives a dark warning from an old friend, the Enterprise-D returns to Earth to stop an alien invasion from taking over Starfleet Command. The USS Enterprise-D is en route for the planet Pacifica for a scientific mission. Commander Riker, along with the rest of the crew, is looking forward to seeing the blue waters and beaches that make the planet a jewel of the galaxy. On the bridge, Geordi La Forge is telling a joke to Data, who, after going into detail of why it is funny