AMIRA: I couldn’t understand how you just cut me off like that!
OWEN: Because I had to! Because Katie died, and I had to become the sort of person who couldn't feel it. Okay?

That line explains so much about Owen, and breaks my heart to boot.

Amira and Owen's relationship is beautifully drawn in this one. You really feel the weight of their history and friendship, and Amira's hurt at being cut off is tangible. The other relationship in the story – Lucy and her sister – is also extremely touching, and very sad.

I did wonder if Amira being a memory creature was necessary for the story; but it did lead to that gutting final scene where Owen, after years on metaphorically turning off his empathy as a coping mechanism after Katie's death, literally turns off his empathy in order to ’defeat’ Amira. It's an incredibly tragic moment I'm still reeling from an hour after listening.

I would love to see more Grace Knight in Torchwood!