Richard Bean, the country’s most bankable playwright, knocks out a new script every four months. Thanks to the success of One Man, Two Guvnors, he’s not short of houses ready to stage his work. And the hunt for treasure in his back-catalogue continues. The Mentalists, from 2002, stars Stephen Merchant (co-writer of The Office) and Steffan Rhodri as two needy chums pursuing a whimsical dream in a cheap hotel room.