Not All Dogs Go to Heaven "American Dad!" character, Avery Bullock in "Lois Kills Stewie" (season 6, episode 5), and his "Star Trek: The Next Generation" character Captain Jean-Luc Picard in "Peter's Got Woods" (season 4, episode 11); Jonathan Frakes, Michael Dorn and Marina Sirtis also appeared in "Peter's Got Woods" as their respective "Star Trek: The Next Generation" characters William Riker, Worf, and Counsellor Deanna Troi. "Not All Dogs Go to Heaven" features the entire original cast of "Star Trek: The Next Generation": Stewart as Captain Picard; Frakes as Riker; Gates McFadden as Doctor Beverly Crusher; Brent Spiner as Lieutenant Commander Data; Dorn as Worf;
Star Trek: The Next Generation Star Trek: The Next Generation Star Trek: The Next Generation (TNG and ST:TNG) is an American science fiction television series created by Gene Roddenberry. It originally aired from September 28, 1987 to May 23, 1994 on syndication, spanning 178 episodes over the course of seven seasons. The third series in the "Star Trek" franchise, it is the second sequel to "". Set in the 24th century, when Earth is part of a United Federation of Planets, it follows the adventures of a Starfleet starship, the USS "Enterprise"-D, in its exploration of the Milky Way galaxy. After the cancellation of "The