Investigating a rupture in the Time Vortex, the Doctor and Leela arrive outside the Grange, an old manor house near a small village, and swiftly learn that the house is home to the mysterious Lord Jalnik and has recently been the source of various ghostly apparitions. With the aid of local girl Charlotte, the Doctor learns that they are dealing with an invasion/evacuation from the future, and must face the question of what happened in the future and how he can save the people.
- And Show It to You: A variation; when Jalnik learns that Kostel is having an affair with her new assistant, he literally takes out the mans heart as he eats the body so that he can present it to Kostel later.
- Body Horror: Jalnik is described as being half-man half-grasshopper, with the right side of his body basically resembling a Pantophagen.
- Continuity Nod: The Doctor references his past visits to the year 4000 ("The Dalek's Master Plan", among others) to affirm that this isn't what the year 4000 should be like.
- Didn't Think This Through: Likely applies to Kostel and Jalnik, as they appear to have had no clear plan for how to stop the Pantophagen once they unleashed them to use as weapons in their planned coup.
- Dumb Muscle: Basically applies to the Pantophagen, who have destroyed all of Earth while giving no sign that they are anything more than large animals.
- Eye Scream: The only way to hurt a Pantophagen with a weapon is to shoot out their eyes, although this has only limited impact on making them less dangerous.
- Gadgeteer Genius: After Jalnik destroys the time portal equipment so thoroughly even the Doctor couldnt repair it in time, the Doctor is able to assemble a new one in a matter of minutes using components from Jalniks discarded prototype time machines.
- Heroic Sacrifice: Geflo chooses to stay behind in her dying future to ensure that the Doctor can get back to 1977.
- His Name Really Is "Barkeep": Jalnik's butler is actually called 'Butler', although given the other names of people from his future it may just be that 'Butler' changed his name to make it easier for him to act as the 'public face' of Jalnik's activities in the past.
- Ignorant of Their Own Ignorance: Arguably applies to everyone from Jalnik's future, as they genuinely believe that two thousand people can go back in time over two thousand years and live out their lives without it creating a massive temporal paradox.
- It's All About Me: Kostel expresses great pride in her own beauty and still appears convinced that she is the best choice to lead her people, regardless of the fact that her actions have destroyed human civilisation because she tried to stage a coup.
- Nigh-Invulnerability: The only things that can hurt the Pantophagen are injuries to their eyes and temporal spillage from the equipment Jalnik used to create his 'ghosts'.
- Sanity Slippage: Jalnik suffers from this, to the point that he becomes convinced that the Pantophagen are talking to him when the Doctor can affirm that he would be able to understand them himself if they were truly sentient and it's really just Jalnik's insanity.
- Sole Survivor: At the story's conclusion, Shibac is the last living member of his original timeline.
- Timey-Wimey Ball: The Doctor gives various speeches about how the human brain just isn't capable of calculating the complex temporal equations necessary to explain why Jalnik's original plan of mass evacuation into the past is a bad idea, or how Shibac can exist in the past even after his future has been erased.
- Tragic Villain: Could arguably apply to Jalnik, as evidence suggests he only participated in the original plan because he was in love with Kostel, even if he clearly went too far off the deep end after his mutation for anyone to truly feel sorry for him at the end.