The skeletons were found buried in the lower bailey of the castle during a community dig.
More than 300 adults and children helped to uncover fascinating finds in 2015.
Archaeologists say the man is believed to have been in his 40s when he died around 400 years ago.
He had endured a hard life having broken both his legs in different incidents which led to complications and infections.
The man also had terrible teeth and an abscess in his jaw.
Radiocarbon analysis has dated the male and female skeletons to the late medieval period when the castle was at its peak. The display coincides with the launch of a new community excavation at the castle which will try and shed further light on the mystery of the bodies in the bailey.