
Titanic: Blood and Steel
S01E05: Under Lock and Key
Mark's story is fully revealed. When he lived in Belfast, he had a girlfriend, Siobhan Doyle. She was supposed to follow him but never did. Siobhan died soon after. His father told him she had died of TB. Instead, she had died at childbirth without him ever knowing. Mark realises how much Siobhan suffered, and is heartbroken. She was sent to a convent. To his utter shock, he finds out that the child survived: a baby girl. He tries to find her, but the nuns will not tell him anything. An accident occurs that forces him back to work: RMS Olympic, a ship in the same class as Titanic, has had a serious accident. Mark is asked to study the implications. Mark's new discoveries are now less important that delivering on schedule. Pirrie and Andrews discover that Mark Muir is a Catholic, but guard his secret.
Overview
Belfast, 1909. The Harland and Wolff shipyard has been handed the greatest project in its history. It will build a great, unsinkable ship. And it will be called the RMS Titanic.
Episodes


S01E02 Stained Steel

S01E03 Good Man Down

S01E04 Danger Looms

S01E05 Under Lock and Key

S01E06 The Imposter

S01E07 The Truth Shell Set You Free

S01E08 High Stakes

S01E09 Burden of Proof

S01E10 A Crack in the Armor

S01E11 The Tipping Point

S01E12 The 'Unsinkable' Sets Sail
Cast






