Plasma

Urak of the Tetraps believed, with the Rani's help, Tetrapyriarbus would have plasma in abundance. (TV: Time and the Rani)

The Fourth Doctor believed that stones in the courtyard on Traken were hit and disintegrated by a plasma beam. (TV: The Keeper of Traken)

Plasma cannons were employed in the 21st century by Torchwood Three (AUDIO: Submission), in the 42nd century in Baltazar's ship (TV: The Infinite Quest), and by the Godspeed. (PROSE: The Hungry Night)

A plasma lab and a plasma intake were components of Ninth Era sunships. (COMIC: The Eye of Torment)