This episode was the third and final part of the story arc known as The Edge of Destruction , which originally aired on . It is notable for being a "bottle episode," taking place entirely within the TARDIS and featuring only the main cast.
While the Doctor Who episode is the most historically prominent, there are modern series with similar titles: [S1E13] The Brink of Disaster
: Following the events of the previous episodes where the TARDIS was seemingly possessed, the Doctor realizes the ship is actually trying to warn the crew of an impending catastrophe. The ship is teetering on "the brink of disaster" as it heads toward the beginning of time—the creation of a solar system—which would cause total destruction due to the immense gravitational and atomic forces. This episode was the third and final part