Her husband—known for the baritone potency he brings to prestige TV dramas like Luther and The Wire, along with films like last year’s critically acclaimed thriller A House of Dynamite—first heard about Sherbro Island years ago. A close family friend had tried to convince him it could become a world-class holiday destination. “At that juncture, I was just like, Oh, OK, that sounds interesting,” says Idris, 53, who co-owns a wine bar in London’s King’s Cross neighborhood. “Like, maybe I’ll build a nightclub, maybe build some tourism.” He made a mental note to visit someday.