Sonic screwdriver (InstanceTopic, 13)

<[#ontology [kind topic] [cats Doctor_Who Tool]]>

The '''sonic screwdriver''' is one hell of a piece of [[technology]] appearing in [[Doctor Who]]. It can open pretty much any lock (unless it's "[[deadlock]]ed", what a [[cop out]]) and do a bunch of other cool things. The screwdriver has actually changed over the years, as can be seen in that one episode where the Doctor ends up with [[two]] of them, due to time travelling into himself or something - they each look different.