 Many characters on the show were voiced by actors who were regular  cast members of the various Star Trek series. These include  Jonathan Frakes (qv) and Marina Sirtis (qv) as regular  characters and guest appearances by Nichelle Nichols (qv),  Avery Brooks (I) (qv), Colm Meaney (qv),  Michael Dorn (I) (qv), Kate Mulgrew (qv), Brent Spiner (qv),  and LeVar Burton (qv). And from the Star Trek films there was  Paul Winfield (qv), who was the starship captain in  _Star Trek: The Wrath of Khan (1982)_ (qv), and David Warner, who  was the Klingon Chancellor in Star Trek VI: The Undiscovered Country  (1991).