Star Trek: The Next Generation: In Theory

"In Theory" is the twenty-fifth episode of season four of the American science fiction television series Star Trek: The Next Generation and the eighty-fourth episode of the series overall (if one counts the two-part pilot episode "Encounter at Farpoint" as two episodes). Combining the episode count of all Star Trek-related TV shows to date, it is the 191st episode of the entire franchise. This episode was directed by Robert Wiemer and written by Harold Apter with the teleplay written by Ronald D. Moore. It first aired in syndication in the United States on June 1st, 1991.