[the Doctor sneezes and as he does so he slowly fades away. Steven and Dodo don't notice right away because they are facing each other]
Bless you.
Oh, Doctor, don't say you're catching a cold now.
[Now Steven and Dodo turn toward the Doctor and discover that he's disappeared] Doctor? Well, where are you?
[the Doctor briefly fades in and out of sight but then completely disappears] What do you mean, dear boy? I'm still here, hmm?
Huh?
Doctor, you've vanished!
What? Oh, nonsense, child! Nonsense! Hmm!
You have! Do you think this is something to do with the Refusians?
Why... it must be!
You're wrong! This is something far more serious. We're in grave danger. This is some form of attack!
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