Other mistake: At the end of this episode when Jonathan and Nicky set off on horseback to the canal to board the tug boat "Heartsease" they leave late at night and arrive the next day. But in episodes 7 and 8 Margaret rides on horseback to Heartsease and home again, and the journey only takes a few minutes.
Continuity mistake: At the end of the penultimate scene when Nicky tells Jonathan that she wants to get back into the cavern to speak to Mr Furbelow, her hair is behind her shoulders and then falls in front of her left shoulder. The angle changes and her hair is in front of her right shoulder and behind her left.
Continuity mistake: Ajeet and Nicky are crouched behind the hedge outside the manor house. Nicky restrains Ajeet by putting her left hand on Ajeet's right shoulder and her right hand is on the ground, the angle changes and both Nicky's hands are on the lapels on Ajeet's coat and she pulls her down behind the hedge. Ajeet's hair plaits also change position.
Continuity mistake: Nicky is crouched down behind the wall, listening to the chief robber telling the villagers what his gang is going to do. One of the robbers throws a chain over the wall, nearly hitting her. Nicky ducks her head down to avoid the chain hitting her, but when the angle changes Nicky's head is upright and she ducks a second time, also she has moved back along the wall a little way.
Continuity mistake: All the action in this episode takes place on the same day, but Nicky is first wearing a brown jumper, then when her and the Sikhs stop for a break Nicky is wearing a blue jumper, then later on she is wearing a black one, with the same grey skirt and blue anorak.
Continuity mistake: After Nicky has been separated from her parents, Nicky and her father are walking the streets looking for each other. A horse and cart with lots of children on the cart and a line of children walking behind it goes past Nicky. She sees her father walking on the other side on the road, but when she walks behind the cart to cross the road, the camera angle changes, and the children have changed places in the line.