CREATE TABLE actorlinkepisode (
  idActor    integer,
  idEpisode  integer,
  strRole    text,
  iOrder     integer
);

CREATE UNIQUE INDEX ix_actorlinkepisode_1
  ON actorlinkepisode
  (idActor, idEpisode);

CREATE UNIQUE INDEX ix_actorlinkepisode_2
  ON actorlinkepisode
  (idEpisode, idActor);