It’s the classic “ghosts of past regrets” episode with the classic “ghosts are really aliens” twist. With past regrets from before the series as the aliens imitating ghosts go for the nearest and dearest, and only three episodes in, so only one of them is someone we’ve seen die in the show itself, and they actually get the least to do.
With some turning to dust rather than gore (for those keeping track, Ram doesn’t get blood all over his face!) it’s the least needs-to-be-after-the-watershed episode of the first half of the run. It could have been a Sarah Jane two-parter. Apart from Miss Quill stabbing her visitor in the hand.
(And she essentially saves the day and gets no thanks for it. Bloody kids.)