<P> The major difference was that only the pilot was shot in black - and - white . After the series was sold to CBS, the network announced a major push in color programming for the 1965--66 season, and so the rest of the season (and the series) was filmed in color . </P> <P> The character of Vladimir Minsk, a Soviet POW played by Leonid Kinskey, was intended to be a series regular . However, Kinskey declined to continue with the series . Stewart Moss, who played an American POW named Olson in the pilot, also declined an offer to become a series regular . Larry Hovis was intended to be a guest star in the pilot only . However, producer Ed Feldman was impressed by his performance and, after Kinskey and Moss declined to take part in the series, was offered a regular role . Hovis's character was changed from a Lieutenant to a Sergeant . According to Hovis, Feldman chose to do this because "sergeants are more sympathetic ." Although Hovis's character had escaped at the end of the pilot, Feldman did not see this as a problem because he believed "no one will care". </P> <P> Outdoor scenes were filmed on the 40 Acres Backlot in Culver City, California . The set was destroyed in 1974 while the final scene of Ilsa, She Wolf of the SS was filmed . The theme music was composed by Jerry Fielding, who added lyrics to the theme for Hogan's Heroes Sing The Best of World War II--an album featuring Dixon, Clary, Dawson, and Hovis singing World War II songs . The song also appeared on the album Bob Crane, His Drums and Orchestra, Play the Funny Side of TV . </P> <P> The actors who played the four major German roles--Werner Klemperer (Klink), John Banner (Schultz), Leon Askin (Burkhalter), and Howard Caine (Hochstetter)--were Jewish . Furthermore, Klemperer, Banner, Askin, and Robert Clary (LeBeau) were Jews who had fled the Nazis during World War II . Clary says in the recorded commentary on the DVD version of episode "Art for Hogan's Sake" that he spent three years in a concentration camp, that his parents and other family members were killed there, and that he has an identity tattoo from the camp on his arm ("A-5714"). Likewise John Banner had been held in a (pre-war) concentration camp and his family was killed during the war . Leon Askin was also in a pre-war French internment camp and his parents were killed at Treblinka . Howard Caine, who was also Jewish (his birth name was Cohen), was American, and Jewish actors Harold Gould and Harold J. Stone made multiple appearances playing German generals . As a teenager, Klemperer fled Hitler's Germany with his family in 1933 . During the show's production, he insisted that Hogan always win against his Nazi captors or else he would not take the part of Klink . He defended his playing a Luftwaffe Officer by claiming, "I am an actor . If I can play Richard III, I can play a Nazi ." Banner attempted to sum up the paradox of his role by saying, "Who can play Nazis better than us Jews?" Klemperer, Banner, Caine, Gould, and Askin play stereotypical World War II Germans, and all had served in the U.S. Armed Forces during World War II--Banner and Askin in the U.S. Army Air Corps, Caine in the U.S. Navy, Gould with the U.S. Army, and Klemperer in a U.S. Army Entertainment Unit . </P>

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