He was played by John Wyman.
Attacking Bond at Cortina
He is first seen in Cortina, going through a biathlon course. Bond, who is skiing with the niece of Aris Kristatos, Bibi Dahl, is forced by Bibi to watch Kriegler, recognizing the man's athletic and marksmanship when he hits every target instantly. Bibi desperately tries to get Kriegler's attention but he only scowls at her.
When Bond takes his leave from Bibi and plans to ski down the mountain, he is attacked by Kriegler, who has been lying waiting in the forest. Kriegler shoots at Bond but misses, allowing Bond to take cover behind a tree. Though he manages to shoot Bond's gun out of his hand, he fails to ultimately hit Bond and the agent escapes under gunfire. When Bond arrives at the base of the mountain, he watches Kriegler arriving moments later and talking to Locque.
Seeing that Bond arrived as well, Locque and another henchman follow the agent, but are unable to attack him as there are too many witnesses. Protected by the masses, Bond enters a crowded elevator which takes him on a ski jump. Though Locque and the other henchman are in the elevator as well, they still cannot attack. Arriving on top, Bond tries to escape by skiing down, but Locques henchman skis with him as well, only to be knocked down as well. Kriegler, who had been lying waiting at the bottom is disarmed when Bond jumps right over him, knocking the rifle out of his hands. Pursued by two henchmen on motorcycles Bond is eventually able to defeat his pursuers. Kriegler, who follows by motorcycle as well, is eventually knocked out of the saddle. Out of frustration, he lifts his motorcycle and throws it after Bond, but misses the agent by far.
Returning to the ice rink, Bond asks Bibi about Kriegler, finding out that he is defecting from East Germany.
Waiting for the exchange
Kriegler is encountered again when Bond obtains the ATAC from the sunken ship. Along with Kristatos, he is present when Bond triggers a alarm, causing Kristatos to send a henchmen down there, who is ultimately defeated by Bond. When Bond and Melina get back to the surface, they find that Kristatos and his henchman have taken over their ship. Kriegler then tells Kristatos that he will deliver the ATAC to the KGB and return with the money, but Kristatos states that their deal was that he would turn the ATAC over at a location of his chosing. He tells Kriegler that he will deliver it to the KGB at St. Cyrils, a clifftop monastery. Kriegler accompanies Kristatos to the place, where they wait for the arrival of General Gogol.
While they are waiting, Bond, who had been in a fistfight with a henchman, falls through a window into the room. Kriegler tries to shoot him but Bibi knocks the gun out of his hand, for which he backhands her, knocking her unconscious. Kriegler then fights Bond while Kristatos leaves to deliver the ATAC, eventually ripping a massive stone sink out of the wall to smash Bond with it. Using a candelabra and the sink's enormous weight, Bond pushes Kriegler out of a window, causing him to fall to his death.