This marks the first appearance of Pauline Lamb, played by Katherine Parkinson. She appears in 24 episodes in total.
Tristan Sturrock makes an appearance in this episode as the character Danny. In the movie Doc Martin (2001) (prequel to the show), Tristan also plays Martin's friend Harvey.
This marks the first appearance of Danny Steel, played by Tristan Sturrock. He appears in eight episodes in total.
Tristan Sturrock, who plays Danny, the Doc (Martin Clunes)'s rival for Louisa (Caroline Catz)'s affections, also appeared all three of the other productions featuring "Doc Martin" (Saving Grace (2000), Doc Martin (2001) & Doc Martin and the Legend of the Cloutie (2003)) as "Harvey".