this is a really good episode during an arc where the doctor doesnt know who he is and is questioning his own morality... robin hood, at his baseline, can feel quite similar to the doctor in how he helps people with nothing to gain from it. and is also a fictional character made out to be a legendary man intended to inspire people. esp after the previous episode where the doctors biggest flaw is shown (after he asks clara if he is a good man), this one emphasizes his best qualities. im a bit of a sucker for anything medieval since its currently my favorite historical period so im also just biased towards this one! but i think it did a great job at what its trying to do here.