This documentary investigates the mercenaries who have made a career out of conflict. Plus: Lucy Beaumont takes to the stage in London. Here’s what to watch this evening

10pm, BBC Four
Up to 100,000 mercenaries are estimated to be operating in conflict zones around the world, as this aggression-filled Storyville documentary tells us, and they have been implicated in global atrocities and blamed for fuelling the illegal arms trade. The programme introduces us to Dave Tomkins, who talks about how he has been fighting other people’s wars for money for 40 years. Hollie Richardson