Helen A was intended to be a caricature of then British Prime Minister Margaret Thatcher. Hancock stated that she “hate[d] Mrs Thatcher with a deep and venomous passion”. In 2010, Sylvester McCoy told the Sunday Times: “Our feeling was that Margaret Thatcher was far more terrifying than any monster the Doctor had encountered”. The Doctor’s calls on the drones to down their tools and revolt was intended as a reference to the 1984-1985 miners’ strike.