This half season, in general, seems to set up things about Clara which then fizzle. I think something very odd was going on with her character here. The Clara we have in seasons 8 and 9 and the Victorian Clara feel to me like a very different person to the Clara we see in this half season who is often rather passive, frequently gets little to do, and is surrounded by all these oddities that seem like they should have significance but apparently don't.