Recently purchased a SMART TV. It features all the four main broadcaster's catch-up TV services (BBC, ITV, All4 & Demand5). I can access all these services yet I'm unable to view certain catch-up TV programs that I can view/stream on my PC and on a separate NOW TV box which is connected to the TV. I haven't worked my way through the entire FreeviewPlay listings so I don't know how many previously broadcast programs (currently listed) are unavailable through the TV but, as an example, I can't catch-up with previous episodes of All4's Big Bang Theory despite the program being listed in FreeviewPlay. And, strangely, many recently broadcast programs appear to be absent from All4's app. when I try to access programs through that yet they are available on the NOW TV box and on my PC. Could anyone kindly explain why certain catch-up programs are unavailable through the TV yet freely available both on the NOW TV box and my home PC? Thanks.