1.Pick any episode of mash
2.Select explore this show
4.(all episodes shown)
5.Select episode (even if it says not available - that's a bug, press select anyway)
6.You then get "watch now from my shows"
7.After watching that episode, it will return to the menu at 4 so you can watch them in order
It's quicker than it sounds !
 quick iPhone video
My "shameless" folder (wishlist) shown has series 4 / 9 and US series 1 mixed together: