Good grief, Aurra's costume is tight. But then, it is kind of literally painted on.
The story and title are an obvious riff on Lassie Come Home, with Artoo rushing home to report that Timmy's fallen down the well (or whatever the real events of that film were).
I wonder... do the sound editors at Lucasfilm have a set vocabulary for Artoo? I.e. does each of his stock sounds have a consistent meaning? It often seems they do. For instance, in TESB and here, I've noticed a four-note whistle, kind of like a bird call, two falling tones then two rising tones with an inquisitive slide to the final tone, that seems to be used in contexts where Artoo might be saying "Hello?" or "Master, are you there?" And then there's the descending "ooh" tone that sounds like an unhappy moan, whose meaning is fairly clear. And the "shriek" noise he makes when he's "in pain" or otherwise under stress. But a lot of the other tones aren't so obvious.
I'd like to see how Artoo's scenes here were scripted, and to what extent his "vocalizations" were specified in the script, if at all.