This is a pretty enjoyable story. Belinda is instantly likeable; she's a nurse who actually gets to use her skills in the story, she's not star-struck by the Doctor, she has a strong personality and agency. I'm looking forward to seeing more of her.

The story is a little more lackluster. Despite the fast pace, it feels very empty, like very little happened. Some of it is due to not really getting to know the side cast and a lot of the quieter moments being rushed through. It's a very simple and straightforward plot.

I must praise Sasha's actress for her acting. The big smile with the tension in the eyes was extremely poignant. Despite that, I really didn't feel that we had gotten to know her enough for her death to have much impact as a viewer. Lingering on her moment of death and focusing on the Doctor crying (again) felt more like the writer was trying to get me to feel something than giving a beloved character a proper send-off. Despite that, I do realise that it's realistic, considering how much time the Doctor spent with her, and I appreciate that she wasn't immediately forgotten about and her presence was felt throughout the episode.

I like the "twist" at the end. The message is solid, and the execution was pretty good. I will say, however, that I don't love the amount of flashbacks used, and the proposal scene was a little heavy-handed. All I needed was his line in the beginning saying "girls aren't good at maths" for me to know he's a condescending prick.

I especially liked the ending, with Belinda telling the Doctor off for scanning her DNA and believing she's just jump on the opportunity to travel with him after seeing what happened to Sasha. I enjoy this darker side of the Doctor, and I'm looking forward to seeing what they do with it.

Other highlights include the polish robot and the Mrs. Flood cameo.

In general, while this isn't likely to ever be a favourite episode of mine, it does have me excited for the rest of the series, which is all a series opener really needs to do.