Cliff Parisi (the barkeeper) also stars in Call the Midwife (2012), which also features a group of nuns.
Hugh Ross plays Bishop Graves in this episode. He previously played the role of Ed Monkberry in episode 12.1, The Dogleg Murders (2009).
Rosalind Knight plays Mother Jerome in this episode. She previously played the role of Eleanor Macpherson in episode 6.5, Birds of Prey (2003).
Joanna David plays Mother Julian in this episode. She previously played the role of Amy Lyddiard in episode 1.2, Written in Blood (1998).
Jessica Turner plays Delia Norrington in this episode. She previously played the role of Brenda Eastman in episode 2.1, Death's Shadow (1999).