Based on your request, which appears to be for a detailed analysis or summary of the TV series episode (titled "The First Regency" ), Episode 5: "The First Regency"
In the show's present-day timeline, Catherine uses her servant to gather intelligence. Catherine tasks her with searching the rooms of Mary, Queen of Scots , looking for compromising letters between Mary and Queen Elizabeth I.
The series is based on Leonie Frieda’s nonfiction book Catherine de Medici: Renaissance Queen of France .
This episode is a pivotal moment in Catherine de' Medici's rise to power, shifting from her surviving at court to actively wielding authority.
Samantha Morton stars as the older Catherine, receiving praise for her "cunning" portrayal.
King Henri departs to lead the French army in defense of the kingdom. In a major move, he appoints Catherine as Regent in his absence, giving her the chance to test her political instincts and governing power.