There's some nice ideas here, with memory as an emotional force. Asking if it's ok to kill a murderer, even if the murderer deserves it, what is the impact on the killer and are they now not a murderer too. Can you avoid your fate, or can fighting against something happening be the cause, does seeing your possible future make that future more or less likely.

There's some fun sci-fi ideas that stem from the weird alien artifact that can show you the past and the future. The episode does take the time to focus on these ideas and the tone of the episode is suitably creepy and melancholic.

But it never really clicked for me. It has the ideas and interrogates them, but ultimately I feel like it didn't actually have much to say.

Owen gets a lot of spotlight in this episode. Although it's nice to see more layers to the character, especially as his brash, crass & creepy demenour made him previously seem superficial and he's been the character I enjoy the least. So to see him troubled & vulnerable by what the artifact shows him is a nice change of pace for the character. I'm just not sure I buy him becoming a vengeful killer. Admittedly the show doesn't have him go through with it, so I guess he's really more of a vengeful threatener. But he certainly thinks about, probably even desires killing the man he saw getting away with murdering a young woman 40 years ago. This transformation feels very sudden and very dramatic to me, and not in a believable way.

Still all in all an interesting episode full of atmosphere. It tries to do something different with both it's plot and it's characters, but is only somewhat successful with both. It does get points for trying though.