Spending so much time with the Doctor(s) is going to rub off on the companion and in last series' Flatline we saw Clara put to the test, armed with the sonic screwdriver, her own companion and a bunch of people to save from a monstrous threat. All while the Doctor found himself trapped inside a rapidly shrinking TARDIS. Rigsy was a great companion for Clara, a streetwise kid encountering an alien menace, someone she keep teach and mentor. As a school teacher she had all the skills and it was wonderful to see her take up that leading role. Kudos to for her ability to heed the Doctor's words and try and think her way out of the situation while leading the trapped populace to safety. Coming just two weeks after that emotional fallout in Kill The Moon, this was Clara back on form and in charge. And she was utterly brilliant.