Uk viewers, you need to read this.
If you watch it on ITV, then they will not be showing episode 2 due to "scheduling difficulties". A segment on radio 5 revealed that they will cut the second ep and go straight onto part 3 "because this is the only episode we could cut without interrupting the story".
So watch episode 2 on here before next weeks episode! because it won't be shown on ITV until after the season finale.