Tonight's episode is called 'Immune' and was written by Nicholas Hicks Beach and is notable for starring no less than three Doctor Who alums (Adjoa Andoh who played Francine Jones, mother of Martha Jones (played by Freema Agyeman) plays a pathologist).
This week's episode is the first of a two-parter (the second part of which ITV will not be airing until a later date gits) written by lead writer, Emilia di Girolamo.
Hi folks - fourzoas's RL is a bit manic at the moment, so she's made me a co-mod for the comm, so I'll be doing the modly discussion posts each week for the new episodes which air at 9pm (BST) on Sundays on ITV1. Spoilers are under the cut!