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The Salisbury Poisonings

13. Science in Secret

The search for answers at Porton Down.

• 20 mins

The Salisbury Poisonings

14. The Hunt for the Poison

Police try to find an invisible weapon.

• 15 mins

The Salisbury Poisonings

15. The Suspects

A sightseeing trip or a mission to kill?

• 26 mins

The Salisbury Poisonings

16. Protecting the Public

The struggle to keep Salisbury safe.

• 18 mins

The Salisbury Poisonings

17. Marina Litvinenko

‘I can’t believe it happened again.’

• 21 mins

The Salisbury Poisonings

18. The Bottle and the Blind Spot

Where and when did Charlie find the poisoned perfume?

• 17 mins

The Salisbury Poisonings

19. The Closing Statements

Those involved have their final say.

• 19 mins

The Salisbury Poisonings

20. The Repercussions

Expert analysis of the impact of the poisonings.

• 23 mins