I recently noticed they've finally uploaded the rest of the series of
Star Trek: Voyager
Star Trek: Deep Space 9
Star Trek: Enterprise
Previously they only had Voyager (series1, possibly 2 as well), Enterprise (series1), DS9 (series1-3) & The Original series on the UK iTunes store....... now they've got the rest of them up there too (but still no "Star Trek: The Next Generation"). Though the price tags are still not recommended for viewing by Pregnant Women & people with Heart conditions @ £25 - £40 a series.
If they're a bit too eye watering for you, check out: