Empty Orchestra Empty Orchestra "Empty Orchestra" is the fourth episode of the third series of the British dark comedy anthology television programme "Inside No. 9". Written by Steve Pemberton and Reece Shearsmith and directed by Guillem Morales, the episode was first shown on 7 March 2017, on BBC Two. "Empty Orchestra" is set in a karaoke booth, and follows a group of work colleagues—Greg (Shearsmith), Fran (Sarah Hadland), Connie (Tamzin Outhwaite), Janet (Emily Howlett) and Duane (Javone Prince)—celebrating the promotion of Roger (Pemberton). Rebekah Hinds also stars. "Empty Orchestra" is close to a musical. The characters sing throughout much of the episode,
Empty set Empty set In mathematics, and more specifically set theory, the empty set or null set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set; in other theories, its existence can be deduced. Many possible properties of sets are vacuously true for the empty set. "Null set" is a distinct notion within the context of measure theory. In that setting, it describes a set of measure zero; such a set is not necessarily empty.