The Doctor's sonic lance
The Doctor's sonic screwdriver had a sonic lance as one of its removable heads. (TV: Robot)
History
The Fourth Doctor used the sonic lance to cut out a lock. (TV: Robot)
A small version of the sonic lance was once carried by the Sixth Doctor, which had a secondary utility as a short-range weapon. Like the Doctor's sonic screwdriver, however, it had a variety of uses beyond the function its name conveyed. While it was seen to allow the Doctor to cut wires whilst repairing his TARDIS, it also helped the Cryon Flast heat up an explosive compound. (TV: Attack of the Cybermen)
The Sixth Doctor later carried a similar sonic lance while investigating into the affairs of the Paradise 5 staff and used it to unlock several doors aboard the station and tinker with the electronics in Peri's staff quarters. It also assisted in Peri's attempt to free the prisoners captured by Gabriel and Michael as offerings to the Elohim. (AUDIO: Paradise 5)
The Sixth Doctor used his sonic lance to blow up a door, in order to escape from the the Rani. When Peri noted that it was in pieces, he said that he had a spare, and would be very careful not to break it. (PROSE: Something Borrowed)
Later, when attempting to free a trapped space whale being hunted by humans, the Sixth Doctor was able to essentially effect a limited "regeneration" on Peri's arm by "cellular reconfiguration". He later stunned their human captors by setting the lance to 3100 hertz at 800 decibels, allowing both him and Peri to escape back to the TARDIS. (AUDIO: The Song of Megaptera)
