While some critics objected to the mix of drama and documentary, and of professional and amateur actors, one described Matheson's performance as "as affecting as it was understated", adding "I haven't seen anyone command the small screen so effectively in a long time. In 2006, Matheson co-starred as a lighthouse-keeper who has a romance with murder mystery author Demi Moore in the film Half Light. He then portrayed the Earl of Essex in a BBC production about Queen Elizabeth I of England called The Virgin Queen, broadcast in the US in 2005 and the UK in 2006. For this role, he sought to emulate the swagger of Marc Bolan, listening a lot to Bolan and Kurt Cobain (for his aggression) in the dressing room; he added "I really, really loved playing this character ...with Essex I felt I had to constantly come outside of my safety zone, which was very liberating for me".