David Starkey explores the tensions created by Elizabeth I's reluctance to marry, which strained the political and religious machinations of her reign.

The self-styled 'Virgin Queen' - devoted only to her country - signified a new era of unorthodox behaviour on the throne.

Though her dalliances with potential suitors such as Lord Dudley provoked much speculation, it was her refusal to choose a spouse from France or Spain - powers that were a threat to the then slight nation of England - that worried the Queen's advisors.

The programme also measures the threat presented by Elizabeth's cousin, Mary Queen of Scots.