Tony has been part of various storylines, including marriages to Mandy Richardson (Sarah Jayne Dunn), her stepsister Cindy Cunningham (Stephanie Waring) and Diane O'Connor (Alex Fletcher), an affair with married woman Helen Cunningham (Kathryn George), the death of his daughter Grace to sudden infant death syndrome, the discovery of his long-lost son Harry Thompson (Parry Glasspool), sleeping with underage Theresa McQueen (Jorgie Porter), his battle with testicular cancer, impregnating Diane, the birth of his children Anthony and Dee Dee, an affair with his stepdaughter Sinead O'Connor (Stephanie Davis), discovering that his biological daughter is Rose Lomax after she and Dee Dee were switched at birth, coping with Harry's homosexuality and relationship with his best friend Ste Hay (Kieron Richardson), being stabbed and taken hostage by serial killer Breda McQueen (Moya Brady) after he discovered her crimes, struggling to return to his life after Breda's reign of terror comes to an end, the return of his father Edward Hutchinson (Joe McGann) into his life, coming over his trauma from Breda's actions, discovering that Diane had a brief affair when he was taken hostage and discovering it was with Edward.