Re: What Should Be Done for Star Trek's 50th
An Adventure In Space and Time
was quite good and did feature several actors who had apeared in the show during the it covered circa 1963-1966.
I'd also recommed The Five(ish) Doctor's Reboot
.It's actually quite impressive who they managed to get to appear in it. But then again maybe not.
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.