Admiralty in the 16th century has organized the fleet into squadrons from at early 13th century and certainly during the 16th century. In 1560 three squadrons were operating in the Channel, Irish Sea and North Sea Until the 16th century, admirals were high officials under kings, and were charged with protecting the realm from sea attack. The English navy's Narrow Seas Squadron also called as the Eastern Squadron mainly operated in the two seas which laying between England and Kingdom of France (the English Channel particularly the Straits of Dover) and England and the Spanish Netherlands later the Dutch Republic (the southern North Sea). Include:
The Massacre of St Bartholomew's Eve this is an anachronism, as the actual massacre took place on St Bartholomew's Day. The BBC Radio Collection release gives the title as, variously, The Massacre and The Massacre of St Bartholomew's Eve. The packaging uses the title "The Massacre", but the accompanying booklet uses both titles. The CDs have "The Massacre of St Bartholomew's Eve" printed on them and this is also the title announced by Peter Purves on the discs themselves. William Hartnell was on holiday during filming of episode two; the Doctor does not feature in the episode, and the Abbot appears in a pre-filmed scene only.