I doktorns och Osgoods Zygon Inversion -avsnitt av Doctor Who (2005) var detta konversation:
DOCTOR: Oh, your specs are broken. I'll fix them. You can wear mine, they're sonic.
OSGOOD: Sonic specs?
DOCTOR: Yeah.
OSGOOD: Isn't that a bit pointless? Like a visual hearing aid?
DOCTOR: What's wrong with pointless? I once invented an invisible watch. Spot the design flaw.
OSGOOD: You're talking nonsense to distract me from being really scared. It's one of your known character traits.
(She puts the sonic sunglasses on.)
DOCTOR: Don't look at my browser history.
(The sunglasses beep.)
OSGOOD: Whoa!
DOCTOR: Yeah, I said don't.
Ser doktorn på ... exotiska material på sin nya bärbara teknik? Eller finns det något annat som doktorn vill behålla privat och som kan få andra att hoppa? Finns det något från doktorens historia, som föreslår vad det här är?