was initially reluctant to take the role, especially after reading the script, stating in his autobiography Jerry Lewis in Person, "The thought of playing Helmut still scared the hell out of me". In addition, he felt that he was wrong for the part, due to the strong subject matter. He asked Wachsberger: After re-reading Joan O'Brien and Charles Denton's first draft, Lewis felt that he would be doing something worthwhile in portraying the horrors of the Holocaust. He signed on to the project, but, in order to make it, he first had to arrange to perform at Caesars Palace in Las Vegas for a month, in order to fulfill the terms of his contract with the hotel. In February 1972, he toured the remains of Auschwitz and Dachau concentration camps and shot some exterior views of buildings in Paris for the film, all the while reworking the script. He lost thirty-five pounds in six weeks by eating nothing but grapefruit. Filming Principal photography began in Sweden during April 1972, but the shoot was beset by numerous problems. Film equipment was either lost or delivered late, and the necessary money was nowhere in sight. Lewis was repeatedly assured that money was forthcoming by Wachsberger, who did not appear at all on set. Wachsberger not only ran out of money before completing the film, but his option to produce the film expired before filming began. He had paid O'Brien the initial $5,000 fee, but failed to send her the additional $50,000 due her prior to production. Lewis eventually ended up paying production costs with $2,000,000 of his own money to finish shooting the film, but the parties involved in its production were never able to come to terms that would allow the film to be released. O'Brien was shown a rough cut of the film in an attempt to acquire the necessary rights to release the film, but after viewing the product decided that it was not fit for release and, therefore, did not enter into an agreement with the producers or Lewis for the unauthorized, derivative work. After shooting wrapped, Lewis announced to the press that Wachsberger had failed to make good on his financial obligations or even commit to producing. Wachsberger retaliated by threatening to file a lawsuit of breach of contract and stated that he had enough to finish and release the film without Lewis. Wanting to ensure the