Bernard Wilkie function

The Bernard Wilkie was a function of the TARDIS and could be found as a handle on the console at least in the standard retro-TARDIS design. (TV: Twice Upon a Time)

Behind the scenes

 * It is unclear exactly what this function does, but based on the meaning of the words "bernard" and "wilkie", it can be assumed that it offers the TARDIS "hard resolute protection".
 * The handle has a black-white label above it which says the name, which was a clever way by the Doctor Who crew to throw in a reference to Bernard Wilkie.