8. An image of a smiley face is seen somewhere on the Enterprise, but that image is not seen on a real nor holographic person.
From Quiz Name That Episode #1
Answer:
Timescape
After Picard, Troi and Data have beamed back onto the Enterprise, which has been frozen in time due to the temporal anomalies permeating the region, they all enter engineering, where they discover that a warp core breach is slowly in progress. When Picard walks over to the warp core, which is venting plasma, he beings laughing his head off, seeing an image of a smiley face within the plasma gas. The captain proceeds to laugh before getting riled up in a state of panic, a scan of his body revealing later that he was suffering from a form of temporal psychosis at that moment in engineering. In "The Naked Now", even though I would say the crew was making plenty of smiley faces at each other, the result of the intoxicating 'disease' having impaired their judgement and causing most of them to become romantically flirty, there are no artificial images of smiley faces seen anywhere on the Enterprise. In "The Game", the crew was making plenty of smiley faces again, this time the result of the device, which was brought onboard by Riker from Risa, giving everyone extreme pleasure. But also again, no artificial images of smiley faces are seen anywhere on the ship in this episode either, and the same holds true for the seventh-season episode "Genesis".