The initial "E" in Morse's name in the memoriam ad stands for the detective's Christian name, Endeavour. Morse's father, an admirer of Captain Cook, named him after the famous explorer's ship.
Despite playing her mother, Rachael Blake, who plays Ann Kriel is actually less than 11 years older than Joanna Christie, who plays her daughter, Sarah.
Cheryl Campbell, who plays Valli Helm , played another character in Morse (Sylvie Maxton in the episode, 'The Infernal Serpent').
Debut of Bradley James.
Laurence Fox (DS James Hathaway) and Laurence Richardson (Police Constable (uncredited) both appeared on Agatha Christie's Marple: The Sittaford Mystery.