Callum Logan, a criminal drug dealer, was the biological father of Kylie Platt's son Max Turner. The pair shared a brief relationship in 2006 before and after Max's birth, but Kylie lost contact when Callum was imprisoned. When he came back into her life eight years later, he attempted to get custody of Max using both legal and underhand methods to do so. His reign of terror against the Platt family ended when Kylie killed him as he was attacking Sarah Platt. Nearly six months after his death, Sarah gave birth to his son, Harry Platt.