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 James Doohan, and DeForest Kelley from the original "Star Trek" reprising their original roles. "Star Trek: The Next Generation" aired for 7 seasons beginning on September 28, 1987 and ending on May 23, 1994. The series begins with the crew of the "Enterprise"-D put on trial by an omnipotent being known as Q, who became a recurring character. The god-like entity threatens the extinction of humanity for being a race of savages, forcing them to solve a mystery at nearby Farpoint Station to prove their worthiness to be spared. After successfully solving the mystery and avoiding disaster, the crew departs