Guest Stars Bradley Hall as Larry Peters Melissa Johns as Miss Scott Charlotte Ritchie as Bonnie Evans Isaac Highams as Ernie Evans Simone Lahbib as Martha Williamson Jemima Rooper as Josephine Hanlan Kassius Nelson as Sheila Delaney Georgie Oulton as Marianne Robertson Jeff Rawle as Dr Abbot Leon Davies as David Evans Mei Mei Macleod as Harriet Davies