What happened between Kirsten and Amy?

It’s not the most burning of questions, true, but the flashbacks to the early days of Amy and Kirsten’s romance are pretty damn beautiful. So what was it that drove them apart?

Jones teases: “In Amy, we have the complexity of a woman who has fallen for another human being and now has to realign who and what she thought she was. I guess she’s also struggling with what other people will think of that new relationship. I did some research and spoke to a lot of women, and it can be a really tricky time for someone who has previously been straight, to adapt to those new feelings and to understand them. And so there was a relationship between Amy and Kirsten, but it stopped.”

Considering how fondly the pair are thinking about one another right now, this writer is hoping that their experiences with the HMS Vigil may make them realise that they’re meant to be.

Then again, there’s a very high chance that Amy is destined to die deep under the sea. Which would, naturally, put a dampener on any romantic plans for the future.

Food for thought, eh?

The next episode of Vigil will air Sunday 19 September, 9pm on BBC One.

Read our recap of Vigil episode three.

Vigil episode 4 recap: we really need to talk about Jackie and the Russian spy