It took twenty minutes each time to dress Caitríona Balfe in the complete 18th-century dress and all of its accoutrements.
What Mrs. Fizt calls a corset (for the benefit of the audience, probably) would have been referred to as a stays in the 18th century.
Doune Castle was used as the exterior of the fictional Castle Leoch. Production designers used molds of the architecture at Doune Castle to build sets at the studio, where the interior castle shots were filmed.
This episode takes place in October 1739, from November 1 to November 6, 1743; and in November 1945.