Yes. Or – delving back into the murky Missing Adventures – there’s the one where Five and Tegan and Nyssa are dealing with a Time Lady who has turned into a vampire (it’s... a long story), and Tegan stakes her in one of her hearts, and Ruadh yells ”two hearts, ape! You need to stake both to kill me! Go on, try! Cut my head off; scald me with holy water, I’ll only regenerate!” Now that I’ve looked it up, I realize that is probably my headcanon, which explains why the new canon of Night of the Doctor isn’t immediately sticking. (Of course, Night of the Doctor *is* canon and the Missing Adventures aren’t, so I’ll just have to get used to it. :) )