Is this a new series that started tonight? If so, I missed it and will have to catch up on iPlayer.
I'd have expected a fanfare from Radio Times if it was new - no repeat indicator, but not in Choices either.
(I've noticed this with RT recently - hiding the fact that a programme is a repeat.)
Edit: Hmph! According to iPlayer, it's a Series 3 repeat from 6 months ago. RT lying again.