Met Opera Spirits From ‘Rigoletto’ to ‘Babylon Berlin’

Bartlett Sher must have ventured more than a mile inside the Metropolitan Opera as rehearsal for Verdi’s staging of “Rigoletto,” which began one last morning. Whenever the singers stopped, Sher would run. Sometimes up the stairs next to the orchestra pit, notes for the actors. Sometimes in the hallway of the auditorium to meet with …