Continuity mistake: The scene set at Sarah's grave takes place in a hilly area with the house shown in the distance. Her surname is spelt Trevanian on the plaque on the gravestone. When Sarah's funeral was shown in Series 3, Episode 8 she was buried on a flat piece of ground near to the house. Every other time the family's surname is shown in print it is spelt Trevanion, including in the engraving on Sarah's coffin at her funeral.
Character mistake: When Alice is releasing the cape vulture at Mara, she twice says "good boy" to the vulture, which means that the vulture is male. When she returns to Leopard's Den and tells Danny about the release, Alice says "Watching her flying away like that was amazing" which would mean that the vulture was female.