After the series launches Colin is approached by people who say they have information – things noticed decades before and never forgotten. But 40 years on can these memories push the investigation forward?

Following Colin’s visit the police get involved – and the team receive shocking news. And, as the investigation draws to a close, a tantalising distant memory brings one more suspect into the frame...

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented by Colin Campbell and Suchin Mehrotra

Additional research: Christian Dametto and Bushra Siddiq

The investigation team make a shocking discovery that sends Colin halfway across the world. It’s a huge gamble for one last shot at the truth – but will he find what he’s looking for?

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented and investigated by Colin Campbell

Why has Vishal’s case remained unsolved for so many decades? Suchin takes a step back from the investigation to look at the bigger picture. What has brought his family to this point? And what’s really going on?

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented by Suchin Mehrotra

After gathering his evidence Colin goes searching – and comes face to face with a man who has a very big question to answer. And following his investigation the police visit Vishal’s family with news...

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented and investigated by Colin Campbell

Colin meets a witness – and a group of men bravely tell him what happened to them at school 40 years ago when they were boys, in the hope that what they know may help the investigation into Vishal’s disappearance...

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented and investigated by Colin Campbell

Decades pass without an answer. But in 2020 lightning strikes. A BBC reporter gets a mysterious call – the man says he’s been deep within the police and he’s seen something that might blow the case wide open...

Presented by Suchin Mehrotra and Colin Campbell

Many miles from home two men make a chance discovery. Vishu gets a call at work, the media descend – and life for this family will never be the same again.

Presented by Suchin Mehrotra

A massive search for the missing child swings into action. The police comb London, the TV news appeals for information, the public report sightings - and suspicion falls on his father...

Presented by Suchin Mehrotra

A young family joins the crowds to celebrate the wedding of Prince Charles and Lady Diana Spencer in central London. But on the way home one of the children disappears and a nightmare begins.

Presented by Suchin Mehrotra