D2)  are the only actors to appear in all six "Star Wars" films. In  second place is Frank Oz (qv) (Yoda) who appeared or performed a  voice in five of the films and in third place are  James Earl Jones (qv) (voice of Darth Vader),  Peter Mayhew (II) (qv) (Chewbacca) and Ian McDiarmid (qv)  (Supreme Chancellor Palpatine/Darth Sidious) who all appear in four  of the films (unless one counts McDiarmid appearing in the 2004 DVD  Special Edition in which he replaces the old actor and reprises his  role as Palpatine in  _Star Wars: Episode V 