I'm sure the 1st episode (which we caught) was on catch-up TVOD but the second one (which we missed) isn't...
I think it's on BBC3 after the 3rd episode on BBC1 on Thurs, so will have to watch it then.
But
why is TVOD so hit and miss, you never know if a program will be available or not? And I just found out my kids are paying a £1 a time to watch ER on demand
- which used to be free