Notes: Title derives from the "Next" caption at the conclusion of the last part.This story is notable for not only ending Sharon's run in the comics, but also ending the Graham Williams era. This is indicated, visually, by being the last story to feature the Doctor's Graham Williams-era costume.
Synopsis: When the TARDIS passes through a magnetic storm, its instruments become as scrambled as K9's circuits. Both K-9 and the TARDIS' instruments reports that they're off target by 400 million years. The planet no longer exists, but enough of its mass seems to remain behind in the magnetic storm to allow its moon to still be in a kind of orbit.
The Doctor, though, is in no big hurry to fix things. He just lands on the moon and goes to sleep. K-9 is left to his own devices. Somehow, though, he has taken on some of the erratic behavior of his master.
He leaves the TARDIS wearing the Doctor's scarf and using a wide variety of human literary clichés and talking to himself.
As he traverses the surface of the moon, he is detected from deep underground by a collection of robots. When the perspective switches to their "base", it becomes clear that the moon isn't a moon at all, but a spaceship. They scan the approaching K-9, and seize upon the fact that he's wearing the Doctor's scarf. This makes them think K-9 is "the Pennant Bearer" whom they've been awaiting for many years.
They leave the safety of their "base"—or, really, the bridge of their ship—and approach K-9 on the surface. Greeting him with the ceremony of a diplomatic dignitary, they explain they have been awaiting the Pennant Bearer so they can collect data on whether it is safe to proceed with the colonization of Deneb 7.
As K-9 gradually returns to his senses, he decides to go through the robots' requested "acceptance of data" procedure. This involves going back to the TARDIS to appear to retrieve a suitability assesment on the colonization of Deneb 7. Unfortunately, the robots join him on his journey back, and enter the TARDIS with him Just wanting to get the whole ceremony over quickly, he doesn't protest their entry, but requests they be very, very quiet. He's worried that the Doctor will be awakened, and he will get scolded for being a "bad dog".
Despite the sleep-threatening noise, the Doctor continues sleeping long enough for him to produce a report, satisfying the robots expectations. Unfortunately for them, the report is not good. It indicates that, indeed, Deneb 7 has been destoyed. One of the robots pipes up, saying that the destruction must've been caused by a "Z-bomb" of the robots' own creation. Now they must wait for the debris from the planet to re-coalesce—a process that will take 4 billion years.
The robots thank K=9 for his report and leave the TARDIS. K-9, without any particular justification from the story, surmises that the "Z-Bomb", must've been ordered by the real Pennant Bearer, and that he must've died in the resulting explosion before he had a chance to report back to the robots.
Sometime after K-9 arrives at this conclusion, the Doctor wakes up. When he does, he's had no clue as to K-9's misadventures.
Notes: The Doctor appears only in the first and last frames, from behind.