In issue 58 of "Vortex," the in-house magazine from #DoctorWhoَ audio-production company Big Finish, fourth Doctor Tom Baker was asked "What’s your one biggest 'Doctor Who' memory?" His response:
"I remember a man stopping me in Oxford Street once, looking at me with absolute incredulity; he couldn’t believe it. He said, ‘Tom Baker?’ A man in his late thirties. I said, ‘Yes’. He said, ‘Tom Baker?’ I said, ‘Yes!’ And he looked at me and in his brain he catapulted back in time and he said, ‘You know, when I was a boy, I was in a home for children; nobody wanted us, you know? It was terrible. And you made Saturday night good.’ And I went to say something to him and I could see him so close to tears that he couldn’t speak. And he shook his head as if to say, ‘Don’t go on, don’t remind me’ and he just did [a thumbs up]. Such a common thing, isn’t it, but suddenly backed up with an expression on his face through his tears that was a knighthood. It was a knighthood. Just thumbs up, meaning it was great, and thanks. It’s incredible, isn’t it? Just a gesture."