Wikipedia
Darmok
"Darmok" is the 102nd episode of the science fiction television series Star Trek: The Next Generation, the second episode of the fifth season. The episode features Paul Winfield, who previously played Captain Terrell in Star Trek II: The Wrath of Khan, and Ashley Judd in her debut acting performance.
This episode is considered one of the most popular of all the TNG episodes, along with the Hugo Award winning "The Inner Light" from Season 5 and "The Best Of Both Worlds, Part I", which was the Season 3 finale and "The Best Of Both Worlds, Part II" and "Family", the first two episodes of season 4.