Joely Richardson has returned to work following the tragic death of her older sister, Natasha, last week.
Vanessa Redgrave, the mother of both women, stars in the series as well but had already finished filming her role prior to Natasha's death last Wednesday.
Natasha, a Tony-winning stage actress who had also starred in such films as "The Parent Trap," died two days after suffering a head injury during a ski trip in Quebec. Her funeral was held on Sunday and attended by a number of stars, including her husband, Liam Neeson. She was 45.