Guest Stars Geraldine James as Caroline Matteson Richard Durden as Oscar Matteson Adeel Akhtar as Billy Christine Bottomley as Mandy Jo Martin as Parole Officer Janice Lizzy McInnerny as Norah Boback Adrian Edmondson as John Boback Juliet Cowan as Tina Keir Charles as Mark Hebe Bartlett as Cerys Sarah Lam as Laura Celia Henebury as Lisa Meera Syal as Gaia Tori Allen-Martin as Lena Kiran Sonia Sawar as Rehanna