In keeping with the variety requirements of the BBC's "light entertainment" format, "The Goon Show" scripts were structured in three acts, separated by two musical interludes. These were provided by the Ray Ellington Quartet – who performed a mixture of jazz, rhythm & blues and calypso songs – and by harmonica virtuoso Max Geldray who performed mostly middle of the road numbers and jazz standards of the 30s and 40s accompanied by the big band. Both Ellington and Geldray also made occasional cameo appearances; Ellington was often drafted in to play stereotypical "black" roles such as a tribal chieftain, native bearer or Major Bloodnok's nemesis (and counterpoint to Bloodnok's affliction) "The Red Bladder".