‘Relativity’ at Northlight: In pursuit of Einstein, and confronting the hard reality of genius

Review: The nature of genius, its obsession and its isolation, lies at the core of Mark St. Germain’s taut, indeed irreducible play “Relativity,” a fictional perspective on Albert Einstein that bears the resonance of reality at Northlight Theatre — thanks to a stellar turn by Mike Nussbaum as the larger-than-life theoretical physicist. ★★★★