Guest Stars Catherine Russell as Frances Felton Ella Bruccoleri as Rena Friedman Patrick Walshe McBride as Caleb Felton Adrian Schiller as Nicholas Levine Oli Higginson as Jack Felton Rhashan Stone as Pete McLoud Laurence Ubong Williams as Kai Whishaw Philip Bulcock as Laurence Carter Michael Moreland as Frank Townsend Natasha Magigi as Nadine Shireen Farkhoy as Sophie Carter Elizabeth Marsh as Mel Dorothea Myer-Bennett as Sadie Friedman