Martin Platt is a fictional character from the British ITV soap opera, Coronation Street, portrayed by Sean Wilson. His major storylines were a relationship with Gail Tilsley (Helen Worth) following the death of her husband Brian (Christopher Quinten) and the birth of their child David (Jack P. Shepherd); a feud with Gail's former mother-in-law Ivy Tilsley (Lynne Perrie); the adoption of Brian's children Sarah (Tina O'Brien) and Nick (Ben Price); affairs with Cathy Power (Theresa Brindley) and Rebecca Hopkins (Jill Halfpenny); his relationship with 16-year-old Katy Harris (Lucy-Jo Hudson); and his involvement in the rescue of Gail from her killer husband Richard Hillman (Brian Capron). He left on 9 November 2005. In January 2018, it was confirmed that he would be returning for a short period. He returned on 22 March 2018 and left on 26 March 2018 to go to New Zealand with Robyn and Charlotte.