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5. The Experiments

Can a 20th-century social experiment shine a light on the mystery of The Unknown Bairn?

• 45 mins

6. The Boy on the Bike

Davie is given a concrete lead and makes a major breakthrough.

• 25 mins

7. The Camp

The investigation hits close to home and a major new piece of the puzzle slots into place.

• 25 mins

8. The Mother

Davie returns to the crucial question of why no one came forward to claim the child.

• 19 mins

9. The Wee Boy

As Davie comes to the end of his investigation, will he reveal what he has discovered?

• 30 mins

Introducing..."The Missing Madonna"

In 2003, a priceless da Vinci masterpiece is stolen in a daring heist.

• 1 min

Introducing - The Forgotten Dead Series 2

The case of 'Mary Ellen', whose body was found in a house cellar in Bolton in 1982.

• 1 min