Child actor
Kevin McNally was cast as the antagonist Robert Osbourne; McNally was chosen because the producers thought he would be perfect to play the part, as is the case with Debra Stephenson, who portrayed his wife. Child actor Daniel Chenery, who played the part of their son, Sammy, was chosen due to his likeness of a younger version of McNally. Also, Simon Crawford Collins's wife made a cameo appearance as a BT operator.