"Reunion" is the 81st episode of the syndicated American science fiction television series Star Trek: The Next Generation, It is the seventh episode of the fourth season. Set in the 24th century, the series follows the adventures of the Starfleet crew of the Federation starship Enterprise-D. In this episode, ambassador K'Ehleyr returns to the Enterprise to advise Captain Picard, who has been chosen as a neutral party to arbitrate the selection of the new Klingon leader from two candidates, Gowron and Duras, one of whom is suspected to be a traitor.