Our family has been watching a TV series Merlin made by BBC. It is so fun. I don't remember anything that I felt uncomfortable with.
Our experience reminds me a little of A Thomas Jefferson Education.This is a book a friend of mine inspired me to buy. The legend of Merlin is a classic. This series definitely seems like a classic interpretation of the legend even if it does not follow many of the classic elements.
There are themes of courage, determination, patience, overcoming prejudice and more I am sure. My wife already came up with an idea to challenge our children to find their quest. And to write about it.