Claus was an assassin who worked for Aristotle Kristatos. He twice encountered James Bond; the first time he tried to kill Bond on the slopes of Cortina, Italy. Bond escaped, but Claus confronted him again on a beach in Corfu, along with Emile Leopold Locque, attempting to kill Bond with beach buggies. Locque ran down and killed Lisl von Schlaf, while Bond flipped over Claus' vehicle. Locque managed to trap Bond at gunpoint and was joined by Claus; however, frogmen working for Milos Columbo emerged from the surf and shot Claus in the back with a harpoon, killing him.