From Wikipedia, the free encyclopedia. Barnaby Kay (born 1969) is a British actor noted for his roles in television, stage and film, and as a member of the Royal Shakespeare Company. Kay is the son of the actor Richard Kay (1937 - 1985), and the grandson of entertainer Arthur Kay (died 1970). He is married to fellow actress Nicola Walker, with whom he has a son, Harry. Among other roles, Kay has appeared in Wuthering Heights (2009), Holby City (2008), Midsomer Murders (2005), Spooks (2004), Silent Witness (2002), Conspiracy (2001), Casualty…