Off Duty | The Guardian Investigates

Can I tell you a secret? Episode one: the beginning

Guardian journalist Sirin Kale takes us to a small town in the north of England to uncover how one man began a decade of cyberstalking

Can I tell you a secret? Episode two: the widening circle

As the cyberstalker spreads his net wider, anyone could be a target. The fast-changing world of social media creates new opportunities for him to find more victims. Only now, someone is watching him …

Can I tell you a secret? Episode three: the man upstairs

Who is Matthew? Journalist Sirin Kale looks for clues about who this cyberstalker really is and why he creates chaos and fear in so many people’s lives

Can I tell you a secret? Episode four: a reckoning

Matthew’s victims come face to face with him as an attempt is made to stop his torment once and for all

Can I tell you a secret? Episode five: a mother’s love

Journalist Sirin Kale meets Matthew’s mother to uncover more about his past, and find out what might have motivated him to cyberstalk his victims for so many years