The programme you are after is called Desert Crusader. It was the successor programme to Flashing Blade. It was made in France and dubbed into English. The beginning always started with a knight and his squire galloping over a hill, pausing and looking back at the camera with a voice-over: "I am a knight without Lord or Country!".
The knight spent each episode killing Saracens and rescuing maidens.
The Timpo-Toy knights available in the 70s were a tie-in to the programme.