Netflix’s Legends, created by Neil Forsyth, is based on the true story of the United Kingdom’s customs officers in the 1990s as they tried to dismantle and take down the heroin importers in the UK.

There’s something to be said about the use of restraint in a crime drama. Less chases and gunfights, a script not trying so hard to be funny… it all adds up to a show that demands attention, like the ...