“The Lehman Brothers resonate powerfully in the National Theatre’s production of The Lehman Trilogy, currently showing at the Gillian Lynne Theatre in London’s West End. This compelling play, adapted from Italian novelist Stefano Massini’s work by the talented Ben Power, explores the rise and fall of the Lehman brothers across three captivating acts, tracing their journey from humble beginnings in 1844 to the financial crisis of 2008.