(Spoilers btw)
Rogue is probably my favourite fifteenth doctor episode so far tied with Boom; I loved Boom because it was a new episode properly felt like doctor who (not to say that the other ones haven’t been amazing too) and I thought the vibes were just immaculate. But ROGUE!! So to start with I love how we have aliens that just look like humans crossed with animals again, but obviously we’ve gotta talk about our main man Rogue. One of my first thoughts about him was that he could‘ve become the doctor’s companion, sorta like how Jack joined nine and Rose, and also that he might be a time agent or might have previously been one, once again like Jack; this then also leads to the idea that the person that he lost could have been Jack if they were working together as time agents, which might then lead to an explanation of Jack’s memory loss if the doctor finds Rogue at some point. I’ve also seen people thinking that Rogue could be “the one who waits”, but my current theory is that “the one who waits”, “the oldest one” and “the big boss” are all the same person, as well as the new boss Rogue said he had. Another thing I’ve seen a few people saying comparing Rogue and fifteen’s relationship to Jack and nine’s is that they’re everything they could’ve been but weren’t because it was 2005, but I disagree that they’re really all that comparable because Jack’s whole thing (when he’s first introduced) is that he openly and obviously flirts with everyone, but it‘s clear that Rogue only likes the doctor and they match each other‘s level of flirting, whereas nine just goes along with what Jack does. I also thought that it was obvious from when you could tell that Rogue and the doctor had a connection and the two of them talking about travelling together that Rogue wouldn‘t survive the episode (by survive I mean that he wouldn‘t end up leaving with the doctor and Ruby). As much as I don’t absolutely love Ruby yet as I don’t think we’ve been able to get to know her enough yet, I thought it was really cute when the doctor called her his best friend <3 , and before seeing that she’d tricked the chuldurs I thought there was a possibility that we could get an episode of Rogue and the doctor looking for her, but now I’m obviously hoping for Ruby and the doctor to find Rogue at some point. I do think that Rogue could come back at some point (finding the doctor) because his character was big enough to the story and to the doctor himself that I think he’d be significant enough to bring back as a part of a bigger plot arc, and I also think that he could become a villain.
This was meant to just be a recommendation for the episode but I accidentally ended up analysing half of it oops