Mysteron guns were developed by the Spectrum Intelligence Agency as a weapon against the Mysterons once-human agents. In the episode
"Operation Time", it was discovered that Mysteron agents were impermeable to x-rays
(which brought the conception of the Mysteron detector), and vulnerable to
electricity, which prompted the conception of the Mysteron gun. Information taken from a quote by Dr.
"A beam of electrons are produced by the
electrodes. These are concentrated by the prisms and projected at the speed of light along the reflective barrel. We anticipate (a range of) something like 50 yards."
These Mysteron guns are red and
silver, have a large body, composed of twin parallel cylinders, a long barrel, and are held by a bar grip against the wearer's
chest, supported by a harness worn over the shoulders. Demonstration of the Mysteron
gun, along with the Mysteron detector, was made in the episode "Spectrum Strikes Back."
Strangely, in the other episodes of the series, it was never used. Bullets from the handgun seemed good enough to stop Mysteron agents, or, for that
matter, a violent explosion. However, in the episode "Noose of
Ice", one such agent was electrocuted by high voltage, just like Doctor Magnus in
"Operation Time". Also, in "The Launching", the handgun didn't seem quite enough to kill the Mysteron agent, who was destroyed in an