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The list at Wikipedia is much more complete than IMDb
https://en.wikipedia.org/wiki/List_of_Masterpiece_Theatre_episodes
https://en.wikipedia.org/wiki/List_of_Masterpiece_Classic_episodes

Upstairs, Downstairs
I, Claudius
The Six Wives of Henry VIII
Elizabeth R
Downton Abbey
Tom Brown's Schooldays
Upstairs, Downstairs (the sequel)
Wolf Hall
Victoria