4.3: The Power of the Daleks
What's the rating?
Wiped.
What's interesting about it?
Patrick Troughton's first story, it's a crime that we don't have this today. But that's just the start of a crime spree, in that we have nothing of his first season.
For those that there to see Troughton's work at the time, he's almost universally considered the best Doctor ever, yet it's hard for us to tell now, given how little of it remains. But we are at least fortunate that a couple of stories recently turned up, so we can get a glimpse of what was.