Rhiannon Lewis doesn't make much of an impression - people walk past her in the street without a second glance. That is until she is pushed over the edge and loses control. Rhiannon's life transforms, but can she keep her killer secret?

• Ella Purnell
• Jon Pointing
• Jeremy Swift
• Leah Harvey
• Tamsin Greig
• Rish Shah
• Taj Atwal
• Jenny Walser