For the purposes of this list, a "Quark story" is one in which one living, authentic Quark plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story.
For the purposes of this list, a "Cyberman story" is one in which one living, authentic Cyberman plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story. For this reason, stories such as Dalek are absent due to only featuring deceased Cybermen on display. Stories like Carnival of Monsters, A Good Man Goes to War and The Vanquishers are also not included due to the Cybermen's appearance being of little consequence to the plot of the story.
For the purposes of this list, a "Mechanoid story" is one in which one living, authentic Mechanoid plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story.
For the purposes of this list, a "Voord story" is one in which one living, authentic Voord plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story.
For the purposes of this list, a "Zarbi story" is one in which one living, authentic Zarbi plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story.