Immortal Sins

S4 E7: Gwen is faced with a terrible decision – she must choose between her family, and Jack. When the assassins strike in the UK, to hold Rhys and baby Anwen hostage, their demand is simple: Bring us Jack. Gwen has no choice but to deceive Rex and Esther, and make Jack her prisoner. She then travels through the night with him, on a long, dark journey of the soul, during which both have to face terrible truths about themselves. But if the key to these events depends on Jack’s history, then what part of the Captain’s long life holds the key..?