Another option would be
https://itunes.apple.com/au/tv-seaso...4/id1137842613
Ultimately it comes down to perception of the service provided and your rights to copy.
BT Netflix, Sky et al are bound by their supplier/distributor (the program and TV show makers, National Geographic, Paramount etc).
You are bound by your supplier (the service provider, BT Sky etc)
Both the program makers and service providers are there to make money. For you to obtain your requirements, you would need to buy the shows in whatever format is provided by the makers (DVD, VHS etc.). However, even then, you are still bound by terms and conditions (under law). For instance, you cannot make copies to distribute or loan to others (you can make a singular back up copy of the original item you purchased in the event of damage, I believe if you physically lost the disc, you are actually required to dispose of the copy and purchase another!).