
There's a moment early in Amy Berryman's new play Walden when NASA botanist Cassie (a stoic Lydia Wilson) enters wearing a plastic face covering that looks like a mix between an oxygen mask and the N95s that have become a wardrobe staple in the Covid-19 pandemic. "You don't need a mask," her twin's boyfriend Bryan (a completely charming Fehinti Balogun) says. "The air is totally safe."Meanwhile, the socially distanced audience at the Harold Pinter Theatre, where producer Sonia Friedman's...