Before auditioning for the role of Merlin in Merlin, Colin was sent the scenes for the character of Prince Arthur by mistake. He didn't get the whole script so he prepared those assuming they wanted to see him for the role of the prince. It was only right before for the audition that he got the scenes for Merlin so he only had some five minutes to read over them. He ended up getting the role and exhausted all the literature of Arthurian legend and Merlin throughout series one and two. He found it hugely exciting to contribute and give continuation to a legend that has been told throughout the years.