Royal Mail is set to release a new set of stamps to celebrate 50 years of the Star Trek TV and film franchise. The long-running space adventure has so far produced more than 780 TV episodes and 13 movies after its first broadcast in the UK in 1969.The main character stamps are new illustrations by London-based artist Freya Betts.The images portray the characters alongside reflective details, including starships, in the background of their respective series.