Episode 2: Out of Time
Jenny followed the Doctor around the console, rather like an enthusiastic puppy, trying to learn and admire and be useful all at the same time. "If these Jaggaroth are this dangerous, shouldn't we come up with some sort of plan? I know we do the whole run away until we can fix the problem thing, but it isn't very constructive! Do you have anything in the databanks about them? Knowledge is power, and right now, most of us in this TARDIS are alarmingly lacking in both!"
Ah, the innocence! The naivety of youth! She actually believed that the Doctor would tell people what was going on, in advance, with clearly defined explanatory terms. She had no way of knowing this was not the case, either because he was playing some cunning game of his own, or he simply didn't have a clue yet. Or, more than likely, both. But she wanted to help, and other than polishing her rifle, there wasn't a lot she could do. Unless she was allowed to fly the TARDIS... Weren't parents meant to give their kids driving lessons?
No, that was for another time. And, indeed, space. They had work to do! She just wasn't clear on what it was, or how to go about it.