• 
  Sophia Di Martino

  Amy / Bertha
• 
  Georgina Campbell

  Abigail
• 
  Rakie Ayola

  Morag
• 
  Leila Hoffman

   Hattie Flowers (2 episodes, 2016)
• 
  Julian Barratt

   Maurice Flowers (2 episodes, 2016)
• 
  Daniel Rigby

   Donald Flowers (2 episodes, 2016)
• 
  Colin Hurley

   Barry (5 episodes, 2016)
• 
  Zita Sattar

   Barbara (4 episodes, 2016)

• 
  Angus Wright

   George (6 episodes, 2016)
• 
  Geoffrey Burton

   Carroll (3 episodes, 2016)
• 
  Olivia Colman

   Deborah Flowers (6 episodes, 2016)
• 
  Desiree Akhavan

   Carol (5 episodes, 2016)
• 
  Will Sharpe

   Shun (6 episodes, 2016)
• 
  Hammed Animashaun

   Ryan (3 episodes, 2016)
• 
  Alistair Green

   Tommy (4 episodes, 2016)

• 
  Rico Canadinhas

   Hugo (3 episodes, 2016)
• 
  Harriet Walter

  Hylda
• 
  Maite Jáuregui

  Vera
• 
  Amie Buhari

  Pan
• 
  Sophie Brooke

  Avelaine
• 
  Helen Cripps

  6 episodes, 2016-2018
• 
  Mariam Haque

  Henri
• 
  Anna O'Grady

  5 episodes, 2018