Did you ever watch Derek Jacobi in the “Brother Cadfael” series on Masterpiece Mysteries? There is a classic episode where Cadfael meets an illegitimate son he fathered while he was a Crusader during the Siege of Jerusalem during the First Crusade.
I did watch it - I may have missed that one. I remember vividly the episode regarding the leper. Those series were iconic, IMO - Claudius, Brother Cadfael, and others.