• 
  Robbie Coltrane

  Paul
• 
  Andrea Riseborough

  Dee
• 
  Kerry Fox

   Zoe (2 episodes, 2016)
• 
  Kate Hardie

   Rebecca (2 episodes, 2016)
• 
  Graeme Hawley

   Dan (4 episodes, 2016)
• 
  Mark Lewis Jones

   Gerry (4 episodes, 2016)
• 
  Susan Lynch

   Christina (2 episodes, 2016)
• 
  Nadine Marshall

   DI Palmer (3 episodes, 2016)

• 
  Tim McInnerny

   Karl (4 episodes, 2016)
• 
  Lucy Speed

   Young Marie (3 episodes, 2016)
• 
  Jeremy Swift

   Simon (2 episodes, 2016)
• 
  Julie Walters

   Marie (4 episodes, 2016)
• 
  Lee Mack

  Lee Mack
• 
  Trystan Gravelle

   Young Paul (3 episodes, 2016)
• 
  Babou Ceesay

   Jerome (4 episodes, 2016)

• 
  Ed Eales White

   Young Karl (2 episodes, 2016)
• 
  Ruby Ashbourne Serkis

   Young Christina (2 episodes, 2016)
• 
  Sarah Middleton

   Young Rebecca (2 episodes, 2016)
• 
  William Wright-Neblett

   Billy (3 episodes, 2016)
• 
  Rosalind Eleazar

   Georgina (2 episodes, 2016)
• 
  Renaee-Mya Warden

   Frances (2 episodes, 2016)
• 
  Cara Barton

   Young Dee (3 episodes, 2016)