For me, Wheel is the weakest story of this season. I like it but it's doesn't have that much new going for it. It's a base under siege, like most of the stories, but this is our fourth one by the Cybermen, unlike the others which featured new monsters this season, or at least new locations. You also have Tomb here as well so there was already a Cyberman story. Then Episode 1 doesn't really connect with anything except at the very end and with four episodes missing, I can see why it's low on the list. Still would love to have it back. It's my sixth choice personally.
The collapse of The TARDIS and the Time Vector Generator would be a treat I think! The end scene where Pat laughs as he pours fresh Mercury into the console is hilarious especially as he hurrumphs at himself probably because he knows we are watching him perhaps!
The Web of Fear. One of my favourite stories ever since I read the Target novelisation as a kid, then much later heard the audio, and finally seeing it last year has only confirmed to me that it's utterly brilliant.
The Management regrets that due to necessary cuts, the light at the end of the tunnel has been switched off.