Guest Stars Jessica Gunning as Jan Louise Brealey as Cass Geoffrey McGivern as Uncle Geoff Penny Downie as Ellen Olivia Poulet as Alison Oliver Maltman as Mike Caius Luckyn-Malone as Young Andrew Matthew Holness as Laurie Julie Dray as Juliet Jonathan Watson as Dave Charlie Baker as Alfie Tate Phaldut Sharma as Chris Tommy Love as Diner Joanne Sandi as Librarian