Board Thread:The Reference Desk/@comment-329384-20140223085241/@comment-88790-20140226145117

According to the New Adventures, I think in Transit it isn't the crotch but a collection of nerves near the shoulder that is a Gallifreyan's weak spot. And Kadiatu Lethbridge-Stewart does use the weak spot against the Seventh Doctor. Probably in Transit or maybe in Set Piece''. Incidentally it was the Third Doctor that showed the Brigadier where this collection of nerves was in case the Brig needed to stop the Master.