In a BBC first, presenter Roger Hearing conducts an interview in Klingon with the language’s inventor, Marc Okrand. Klingon, the language spoken by the fictional Klingons in the Star Trek universe, is at the heart of a copyright case being fought by the studios that own the franchise and the makers of a Star Trek fan movie.

Picture: Star Trek fans dressed as Klingons at a Comic-Con Convention in California. Credit: Getty Images