Cassie Plummer (Claire Sweeney) has left Coronation Street under a dark cloud - and we may never know where she ended up. Ultimately, Ty decided to give his dad another chance – on the understanding that Cassie was OK with this. Cassie hoped that by drugging Ross, he'd lose his job at Highfield Prison and be forced to leave. Read more:Coronation Street airs weeknights at 8:30pm on ITV1 or can be streamed from 7am on ITVX. AdAdd Coronation Street to your watchlist on the Radio Times: What to Watch app – download now for daily TV recommendations, features and more.