The Emissary (Star Trek: The Next Generation) The Emissary (Star Trek: The Next Generation) "The Emissary" is the 20th episode of the of the American science fiction television series "", the 46th episode overall, first airing on June 26, 1989. In this episode, the "Enterprise" is sent a half-Klingon, half-human emissary to help them deal with a three-quarter century-old Klingon sleeper-ship who believes they are still at war with the Federation. The Federation starship "Enterprise", under the command of Captain Jean-Luc Picard, receives an urgent message from Starfleet Command ordering them to a set of coordinates without stating a reason. While en route, they are contacted by
Descent (Star Trek: The Next Generation) Descent (Star Trek: The Next Generation) "Descent" is the 26th episode of the and the first episode of the of the American science fiction television series "", the 152nd and 153rd episodes overall. Set in the 24th century, the series follows the adventures of the crew of the Federation starship "Enterprise". The episode features a guest appearance by Stephen Hawking, making it the only episode to feature a guest star appearing as themselves on any "Trek" series. On the holodeck, Lt. Commander Data plays a game of poker with holographic representations of Sir Isaac Newton, Albert Einstein, and Stephen Hawking.