This is the greatest thing in all of classic Doctor Who
The thing I keep banging on about is that he doesn’t know what age he is. He’s lying. How could he know, unless he’s marking it on a wall? He could be 8,000 years old, he could be a million. He has no clue. The calendar will give him no clues.
—Steven Moffat, SFX, May 2010
Classic Who Monsters You’ll Never See on New Who - Vervoids
Earth Idioms and Proverbs, Seventh Doctor Style - Part 3