“The Sacred Flame, or Flame of Life, was the heat source that created the life-prolonging Elixir...Sacred Flame
“Oxygen was one of the primary elements required for the functioning of many carbon-based life...Oxygen
“In theory, Stahlman's gas, named in honour of Professor Stahlman, was a source of energy found...Stahlman's gas
“Caesofine gas, also known as Caesofine concetrate or Sezerfine gas, was a type of gas utilised...Caesofine gas
“Praxis gas was a type of gas. Celery would turn purple in praxis gas. The Fifth Doctor was...Praxis gas
“Hexachromite gas was a smoky gas used to seal underwater structures. It was used by humans in...Hexachromite gas
The following 39 pages are in this category, out of 39 total.