The TARDIS materialises in Paris in the year 1572 and the Doctor decides to visit the famous apothecary Charles Preslin. Steven, meanwhile, is befriended by a group of Huguenots from the household of the Protestant Admiral de Coligny. Having rescued a young serving girl, Anne Chaplet, from some pursuing guards, the Huguenots gain their first inkling of a heinous plan being hatched at the command of the Catholic Queen Mother, Catherine de Medici.
William Hartnell
as The Doctor / Abbot of Amboise
Peter Purves
as Steven Taylor
David Weston
as Nicholas Muss
Eric Thompson
as Gaston, Viscount de Lerans
Annette Robertson
as Anne Chaplet
John Tillinger
as Simon Duvall
Christopher Tranchell
as Roger Colbert
Erik Chitty
as Charles Preslin
Edwin Finn
as Landlord
Clive Gazes
as Captain of the Guard
Reginald Jessup
as Servant
Barry Justice
as King Charles IX of France
