Ion bonder

The ion bonder was an energy weapon owned by Nyssa of Traken, allegedly based on ion energy. It shot a green ray.

Stunning was its main effect, even if its ion rate could be stepped up. It was used by the Fourth Doctor as well. (TV: The Keeper of Traken)

The weapon was waterlogged on Castrovalva. (TV: Castrovalva)

The Fifth Doctor and Nyssa used an ion bonder whilst effecting repairs on the TARDIS. Tegan Jovanka had it when she was transported onto the Exemplar and used it to get through locked doors. (AUDIO: Zaltys)