@helmut_meukelAll very solid objections: Ralord, Helmut and Akarge, yet in most of those, they keep bouncing from one to another, mainly with a specific, non-specified objective which they had to solve before they could move on to the next stage.
With my scenario, at least, they're merely trying to discover enough to survive, long enough to escape, largely unscathed (with the benefit of, for everyone lost, they too would have to 'select' locals to aid their efforts. It's a very similar theme, yet with a more distinct out, other than whenever the show gets cancelled, or a newDr. Who is chosen.
And of course, as it's a peaceful mission, designed to test the technology, the objectives aren't nearly as clear, as they're again, just trying to survive long enough to return. Of course, whether they do or not, is an open question.
I've always preferred the more undefined, exploratory missions, where the protagonists are faced with an unanswerable scientific mystery—which they've just uncovered—which needs to be resolved before they can resume their normal lives. A similar focus, just more open-ended.
But, it was just an idea, and one I'm unlikely to explore myself. So, if anyone finds a use for it … By the way, those are known as 'mission tropes', where the purpose is to serve a specific mission agenda. Mine fits the same trope, yet here, their mission is simply escaping relatively unscathed, rather than 'saving' anyone is particular. If they do, that's beneficial, yet it's an independent byproduct of their purely exploratory mission.
I've written MANY sci-fi 'mission trope' stories, as the whole idea behind tropes is that the basic premise can easily be reused infinite times to create completely different, uniquely original stories, as the tropes are merely 'proven, bankable story concepts' authors can build upon, however they desire.