I don't care for gratuitous violence to randos in Doctor Who generally unless it's either dramatically weighty or kind of funny, so I decided the cat zap was worth it for Bels asking Mrs. Flood to tell their neighbor she sent the cat to live on a farm mid-abduction.
Speaking of abruptly killing off minor characters, I'm not sure if it was the acting, directing, or writing, but I think they really needed to pull out their A-game to sell Sasha-55 as a companion in a couple of minutes, and we got the C-minus game, at best.
RTD2 is clearly as much in conversation with Moffat's era a Moffat's was with RTD's, but I don't think Davies has the same instinctual acuity for handling timey-wimey stuff in terms of i-dotting and t-crossing. Like, when Moffat did something whacked out like that, it was usually pretty straightforward (within the logic of the situation) what the implications and conclusions were, but I'm confused in a way I don't think I'm supposed to be about what exactly happened when the Doctor was shot through Belinda's life.
Like, when Moffat did a similar thing with Clara, it's very clear what happened; throughout the first fifty years of Doctor Who, the Great Intelligence was constantly trying to kill the Doctor off-screen, and duplicates of Clara were constantly foiling its schemes, 99% of the time with the Doctor being none the wiser. In this, was the Doctor physically in Belinda's life? He remembers it, but as an observer or participant? Did he slot in over other people, or was he trapped on Earth stalking her since she was a baby? Belinda doesn't remember him, so how does that fit in? What happened to Alan, was his mutilated robo-body just de-aged past zero in the present, or was he never born? The Doctor being sent back suggests the latter, so does that do something to Belinda's life (or everyone else's) now that this somewhat shitty guy was never there?
On balance, though, I thought it was a solid episode, and I'm looking forward to the rest of the season.