Donald Sutherland's voice is dubbed by another actor.
While Donald Sutherland is the actor appearing in the film as Chorus Leader, his voice is dubbed by Patrick Allen,
King Laius does not appear in the original play; he is only referred to.
Epilogue:
Citizens of our ancestral Thebes Gaze on Oedipus the Mighty and once Masterful; And count no man blessed in his life until he's passed beyond all pain and earthly strife. Sophocles circa 430 B.C.