Ray Austin became the fight arranger for series 4 and 5, introducing kung fu to the series. Ray Austin had been training with Chee Soo and they worked techniques from Feng Shou Kung fu and T'ai Chi into the fight scenes and credit sequences. Ray Austin, Diana Rigg and Chee Soo were later awarded a Guinness world record as the first people to show kung fu on television. Later he became a prolific television director. Joe Dunne took over for series 6.