Several people who've heard rumours about the treasure turn up on Inishbofin as the dive expedition continues. A solution to the riddle of the diver's and boatman's conflicting stories. And a conclusion nobody saw coming.

Fifty years after the 1969 dive team say they found the Falcon Blanco we take to the water. The enormous scale of what is ahead reveals itself. A nasty shock about the origin of the cannonball.

Episode 5, 'Full Fathom Fifteen' will be published on Wednesday 14th August.

The only survivor of the Falcon Blanco tells his story. A commercial salvage operation hunts for the same wreck.

Confronting the divers with the boatman's version of the truth. Following all the leads so far to their logical end.

Disagreement among the four divers about what they did or did not find in 1969. The boatman who believes they hid the truth from him.

A mysterious civil servant sends four divers in search of sunken Spanish Armada gold in 1969. A bit of digging on Inishbofin in 2019 suggests there may be some truth to it.

A 400-year-old mystery wrapped up in a modern day hunt for sunken Spanish Armada gold. Journalist Philip Boucher-Hayes investigates the claims of a group of divers to have found a wreck fifty years ago, before diving the site himself.