[SPOILERS WITHIN!] I am rewatching Doctor Who from the beginning. I do not expect to watch every episode but I am having a good time with season 1. I’ve made it through 1963 and am working on 1964. In season 1 episode 31, Strangers in Space, the need to cut through a door and pull out a tool which resembles a Dremel rotary tool. The Doctor expresses interest in "what powers it?" Could this be the inspiration for the sonic screwdriver?
Clip from Strangers in Space, s1ep31 at minute 20:25.
