three Californian Tool concerts in December 1995. Tool was the first large act that Tenacious D were a support act for. Black had previously attended UCLA with director Jason Bloom; therefore, when Bloom was made the director of 1996's Bio-Dome, Black and Gass were invited to perform a short song in the film. The two wrote the song "5 Needs", and this was their first on-screen appearance as Tenacious D. In 1997, Tenacious D had become a popular act on the Los Angeles music scene and would perform residencies at The Viper Room. Pete Stahl, the vocalist of the band Scream, worked at The Viper Room at the time and became a fan of Black and Gass. Stahl invited friend Dave Grohl to come and visit The Viper Room to see Tenacious D, though Grohl initially didn't want to go. Grohl changed his stance and went to see the band perform a couple of weeks later and thoroughly enjoyed it. This would start a relationship between Grohl, Black and Gass. Tenacious D recorded their songs "Tribute", "Kyle Quit the Band", "Krishna" and "History" and released them in a demo tape called Tenacious Demo in the late 1990s with Andrew Gross, distributing it to various record companies, until HBO offered them a TV show based upon the tape and Black's work on Mr. Show. Television series and Tenacious D (1997–2002) Cross, with Mr. Show writer Bob Odenkirk, continued his involvement with Tenacious D by producing three half-hour shows based on the band. The series, entitled Tenacious D, premiered on HBO in 1997, immediately following an episode of Mr. Show. While a total of three episodes consisting of two shorts each, ten to twelve minutes in length, were produced, only the first was aired that year; the final two episodes did not air until the summer of 2000. According to Gass, the series was cancelled after HBO requested ten episodes with the stipulation that he and Black would have to relinquish their role as executive producers, and only write songs. After the series aired, the band continued to perform live. At a show at the Viper Room in Los Angeles, they met Dave Grohl, who remarked that he was impressed with their performance; this led to their cameo in the Foo Fighters' "Learn to Fly" music video. The popularity of Tenacious D further increased as they began to open for high-profile acts,