"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 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 features.

"Empty Orchestra" is close to a musical. The characters sing throughout much of the episode, with the story being told through the lyrics and the way the characters interact during songs. In comparison to other episodes of Inside No. 9, "Empty Orchestra" is upbeat, features romantic elements, and lacks explicitly bloody or macabre references. The filming experience and resulting episode was a highlight of the series for Pemberton, but raised technical challenges, in part due to simultaneous singing and talking.

Television critics had a mixed reaction to the episode. In both The Daily Telegraph and The National, it was characterised as weaker than others in the series. The change in tone divided commentators, some of whom found the setting and constant noise a distraction. The writing and production, however, were praised, while the cast were commended both for their performances and their willingness to embrace the episode's concept.