Whilst searching through the loft, Boycie finds some ancient scrolls and paperwork left behind by the old squire.
He also finds a medieval recipe for a traditional local liquor called 'Ye Potato Cyder'.
The recipe is accompanied by a royal charter allowing Boycie to make and sell the liquor.
With the help of his staff he goes into full-scale business building a distillery in his barn and buying up all the potatoes in the locality.
During its original airing, the episode had a viewing figure of 4.02 million, in the 8:30pm time slot it was shown.