Johnson and Alice in “Day Four”

[about Steven] He doesn't know Harkness is his grandfather?

Alice

No.

I suppose it would take some explaining, why Mum looks older than Granddad...

Alice

I can only assume that you're holding me here as insurance against my father. But let me warn you; if you've angered him, then God help you.

This from the woman who's spent her life running away from him.

Alice

And why d'you think I did that? A man who can't die has got nothing to fear. So you watch it. And you keep watching.