“The Sacred Flame, or Flame of Life, was the heat source that created the life-prolonging Elixir...Sacred Flame
“Soliton gas was a greyish-white gas with a distinct, musty smell. It was highly flammable when...Soliton gas
“In theory, Stahlman's gas, named in honour of Professor Stahlman, was a source of energy found...Stahlman's gas
“Praxis gas was a type of gas. Celery would turn purple in praxis gas. The Fifth Doctor was...Praxis gas
“Hydrogen chloride composed 22% of the 456 atmosphere. (TV: Children of Earth: Day Two)Hydrogen chloride
The following 39 pages are in this category, out of 39 total.