Heiress Margaret Sweeny is in the midst of a divorce when she meets the dashing (and married) Ian Campbell, future Duke of Argyll.

A French couple hire Eric and his team to rescue their kidnapped surrogate baby who has a dangerous medical condition and needs immediate care.

A secret World War II document opens Elizabeth’s eyes to grim realities about a family member. The Duke of Windsor campaigns to re-enter public life.

A Jack themed episode Whilst investigating an old, derelict dance hall, Jack and Tosh are transported back to the 1940s, during the Blitz. Owen, Ianto, and Gwen realise, in modern…