She cares so I don't have to.

"Into the Dalek" features some much needed character development for Clara. The episode uses her as a foil during the Doctor's journey quite successfully. The trend of darker cerebralism continues in this episode with a look at the nature of hatred. The leading duo play with this well, regardless of them being separated for parts of the episode.  The idea of the Doctor making a good Dalek is revisited here in a way that doesn't feel cheap or rehashed. The internal struggle is played well by Capaldi. You can really see his mind at work here. It will be interesting to see how the events of this episode effect the Doctor/Clara relationship.