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;
Unification (Star Trek: The Next Generation) previously requested $1 million to cameo in the series, but he took minimum SAG pay to reprise the role of Spock to publicize "Star Trek VI: The Undiscovered Country", on which he was executive producer. This episode is one of four times that an original series character reprised his role in "The Next Generation"; the other three being "Encounter at Farpoint" (DeForest Kelley), "" (Mark Lenard), and "" (James Doohan). The episode was dedicated to the late Gene Roddenberry, who had died shortly prior to its broadcast. Unification (Star Trek: The Next Generation) "Unification" is a two-part episode of the