Oops! You need to enable JavaScript in your browser to start watching. Guidance: With some strong language. Disable parental controls Enable parental controls ITV The Sister Series 1 - Episode 1 Psychological thriller. Nathan, a devoted married man, is shocked when an unwelcome face from his past turns up on his doorstep. How far will Nathan go to keep a secret? Tomorrow 10pm 60 mins Share this episode: Copied to clipboard Share on Facebook Share on Twitter Copy link to share