Saskia Reeves plays Summer Pitt in this episode. She previously played the role of Marcia Macintyre in episode 13.1, The Sword of Guillaume (2010).
Cherie Lunghi plays Alexandra Monkford in this episode. She previously played the role of Lillian Webster in episode 7.1, The Green Man (2003).
Adrian Scarborough, who plays Tony Pitt, previously appeared in 5.3 Ring Out Your Dead (2002) as Peter Fogden, and in 10.6 Picture of Innocence (2007) as Eddie Carfax.