Nicholas David Ross is a British radio and television presenter. During the 1980s and 1990s he was one of the most ubiquitous of British broadcasters but is best known for hosting the BBC Television programme Crimewatch, which he left in 2007 after 23 years. He has subsequently filmed a series for BBC One called The Truth About Crime and has made documentaries for BBC Radio 4. He is chairman, president, trustee or patron of a number of charities including the National Fire Chiefs Council, and is President of the British Security Industries Association.

Crimewatch is a British television programme produced by the BBC, that reconstructs major unsolved crimes in order to gain information from the public which may assist in solving the case. The programme was originally broadcast once a month on BBC One, although in the final years before cancellation it was usually broadcast roughly once every two months.