Ten best Star Trek: The Next Generation episodes
"The Inner Light"
There are few, if any, Trek episodes from any series more poignant than this one. Picard is hit by an alien probe and goes unconscious. He awakes in a new world, where he's told he is someone else and that his memories of the Enterprise are merely figments of a fever dream. He proceeds to live an entire lifetime on the planet, raising a family, learning to play the flute and discovering the imminent destruction of his world. Eventually, after his children are grown and his wife dead, he sees a probe launched that contains the memories of his planet, sent to contact aliens and share those memories. Upon realizing he's the one the probe met, he awakes on the Enterprise, and when the probe is brought aboard he finds his flute inside. Good stuff -- so good it won a Hugo.