​From Wikipedia, the free encyclopedia.   Mark Letheren (born 1971, Chelmsford, Essex, UK) is an English actor possibly best known for his role as journalist Simon Kitson in ITV1s drama The Bill and for his recurring role as DS Kevin Geoffries in Wire in the Blood. Description above from the Wikipedia article  Mark Letheren, licensed under CC-BY-SA, full list of contributors on Wikipedia. ...