Because sometimes being the third party tells you more, and event or no, there's no reason to lie about certain things.

However, there are reasons why someone would it would seem that way. [In fact, he thinks he might've stayed at the clinic if the Doctor hadn't been hypnotized into being a guard.] Saxon is-

[Stop, try that again.]

You won't believe what I say on any of this, Mrs Montague. There are many reasons why someone would rescue a girl that many people like, even if they wished the person harm. I'm not going to give reasons or stories. I'm just saying to ask this to someone you do claim to trust.