Summary: For once, Martha is the one keeping the Doctor safe.
It’s strange, almost like their roles have been reversed. The Doctor doesn’t remember who he is; as far as he’s concerned he’s simply John Smith, the new teacher at a boarding school for boys, while Martha’s nothing more than a housemaid. Right now, she knows more about him, about both of them, than he does, but he explained it was necessary; he had to hide what he is, be someone else for a while.
For now she has to be the strong one, watch over him, keep them both safe, until it’s time for him to resume his real life.