Of the 19 credited actors in this episode 8 have appeared in Doctor Who. Catherine Tate was Donna Noble, the companion of the tenth Doctor. Frances Barber has a recurring role as Madame Kovarian (eye-patch woman). Zoë Wanamaker was Cassandra in 'The End of the World' and 'New Earth'. Gerard Horan was Father of Mine in 'Family of Blood'. Robert Pugh was Tony Mack in 'The Hungry Earth', and Claire Skinner and Alexander Armstrong were Madge and Reg Arwell in the 2011 Christmas special, 'The Widow and the Wardrobe', and Keeley Hawes was Ms Delphox in 'Time Heist' in 2014.
Several cast members have all appeared in Midsomer Murders (1997) including Claire Skinner, Cherie Lunghi, Frances Barber, Elaine Paige, and Gerard Horan.
Zoë Wanamaker (Letitia Blacklock ) and Christian Coulson (Edmund Swettenham) are both part of the Harry Potter Family.
Robert Pugh (Colonel Easterbrook) & Frances Barber (Lizzie Hinchcliffe) also worked together on episode 1.2, Wicked Wedding Night (2011), of Death in Paradise (2011) as Mike Watson & Diana Watson respectively,