After nine episodes, season 3 of “Succession” has come to a dramatic close. And like last season’s explosive cliffhanger, the Emmy-winning HBO family drama has ended with another, unexpected game-changer. “It’s a lovely hook,” says Matthew Macfadyen, who plays Shiv’s husband, Tom Wambsgans, adding that the finale filmed in “the beautiful rolling hills of Tuscany and the lakes of Northern Italy” was a scenic, if not shocking finish to the season.