In a play by this author, the art dealer Ernest Friedman declares he could “never understand this disgusting three-sided erotic hotch-potch” after finding his wife with a pair of characters originally played by this author and his friend Alfred Lunt. That play by this author depicts the bisexual love triangle of Gilda, Otto, and Leo and is titled Design for Living. A character in another play by this author who is called “feckless, irresponsible, and morally unstable” torments another character with a (*) floating vase and is summoned by Irving Berlin’s (10[1])song “Always.” (10[1])In that play by this author, Ruth is killed in a car crash (10[1])after Madame Arcati conducts a séance which inadvertently summons Charles Condomine’s (10[1])deceased wife Elvira. For 10 points, name this British playwright of Blithe (10[1]-5[1])Spirit. ■END■ (0[1])