Re: How many reset buttons?
Well when shows are re-run (at least in the UK) they are always shown in order. Even the multi-part stories which are shown over the course of a few nights.
And even if you miss a few episodes in a serliased show the "LAst Time/Previously" shows you the basics of what you missed and need to know.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.