The Black Brigand.

The Black Brigand' (1956) - starred William Devlin as Carl the White King, Laidman Browne as Don Rogano and Anthony Newlands played Fernando. Carl the White King was a Macchiavelian figure who ruled the country with cruelty and oppression. Don Fernando, exiled from court, was a Robin Hood/ Zorro type figure who redressed ordinary people's grievances, but whose identity was unknown to the King. Series is believed to be lost.