In March 1970, during the period of King Crimson's early success, the band was promoting their debut album, "In the Court of the Crimson King," which was released in October 1969. This album played a significant role in establishing the progressive rock genre, showcasing the group's innovative approach to music with its complex compositions and rich instrumentation. The live performance of "Cat Food" on the BBC's "Top of the Pops" featured Greg Lake, who was already a prominent figure in the band, contributing both vocals and bass. Notably, "Cat Food" later appeared on the band's 1970 album "In the Wake of Poseidon." This early appearance on a major television platform highlighted King Crimson's growing popularity and their ability to blend theatricality with musical experimentation, setting the stage for their future influence on progressive rock.