Dexter "Dex" Walker is a fictional character from the Australian soap opera Home and Away, played by Charles Cottier. He made his first screen appearance during the episode broadcast on 30 July 2009. Tom Green originated the role, but when the Walker family returned in 2010, Cottier took over the part. Cottier quit the role in early 2013 and Dexter made his last appearance on 13 November 2013.