In an episode about space on the new show “A World of Calm,” nothing much happens. A shot of a nebula in the Milky Way galaxy is notable, but only because it lasts for one minute and 51 seconds, an eternity in TV.
Nothingness is key to the new show, a collaboration between HBO Max and the health-and-wellness app Calm that is successful if it lulls its viewers into a deeply relaxed state, perhaps even sleep. Each episode is narrated by a different celebrity and has a loose story line, covering themes such as ocean life and…