The best I can come up with is:
sql code:
SELECT those_columns FROM tblFilms WHERE (tblFilms.Actor1=NAME1 OR tblFilms.Actor2=NAME1 OR tblFilms.Actor3=NAME1 OR tblFilms.Actor4=NAME1)
INTERSECT
SELECT those_columns FROM tblFilms WHERE (tblFilms.Actor1=NAME2 OR tblFilms.Actor2=NAME2 OR tblFilms.Actor3=NAME2 OR tblFilms.Actor4=NAME2)
But I dunno if your SQL engine supports INTERSECT (at least MySQL doesn't seem so). But if you're just doing an assignment then I think it's fine.