Jason is the son of Eileen Grimshaw (Sue Cleaver) and Tony Stewart (Alan Igbon; Terence Maynard), but he did not know his father for many years, his younger brother is Todd (originally Bruno Langley, now played by Gareth Pierce). Jason's storylines have mostly revolved around his failed relationships with various women including, Sarah Platt (Tina O'Brien), Candice Stowe (Nikki Sanderson), Violet Wilson (Jenny Platt), Becky McDonald (Katherine Kelly), Rosie Webster (Helen Flanagan), Stella Price (Michelle Collins), Maria Connor (Samia Ghadie) and Eva Price (Catherine Tyldesley). His other storylines have included: being attacked by his enemy Callum Logan (Sean Ward); grieving for his father, Tony, after he dies off-screen; and becoming a suspect in Callum's murder. He leaves Weatherfield after being manipulated by his mother's new boyfriend and later husband, Pat Phelan (Connor McIntyre).