The Forum presents Saint-Saens’ opera “Samson et Dalila” a vivid, seductive staging, featuring a monumental setting for the last act at Temple of Dagon, where the hero crushes his Philistine enemies. When mezzo-soprano Elina Garancia and tenor Roberto Alagna joined forces for a new production of “Carmen” at the Metropolitan Opera (the Met) , the results were electrifying. Now this star duo reunites for another sensual French opera as they open the season in the title roles of this biblical epic, “Samson et Dalila.”