Timelines (A Doctor Who/Undertale crossover)
  • Reads 23,177
  • Votes 987
  • Parts 20
  • Time 1h 35m
  • Reads 23,177
  • Votes 987
  • Parts 20
  • Time 1h 35m
Complete, First published Jul 03, 2016
What happens when a human gets tired of resets? When the thrill of a genocide route becomes boring and mundane? This is exactly what happens to Frisk. They spent so much time going through reset after reset that now they are growing tired of it. However, little do they know that their next timeline will be one of the most interesting they've ever had. When Frisk resets after an incomplete genocide, it captures the attention of a certain alien Timelord called The Doctor. He has to travel between dimensions to investigate this strange anomaly, but ends up with an adventure much more strange than he had initially anticipated. This timeline is breaking. The entire reality is being torn apart and it's up to Frisk, Sans, and The Doctor to stop it.


(Disclaimer: I do not own Doctor Who or Undertale. The only thing I own is the plot line and the writing.)

Cover art by @GodOfChaos3900
All Rights Reserved
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Slide 1 of 10
× [Sickness] × || Undertale Fanstory || The Gasters/Skeleton Family cover
What Went Wrong? cover
Undermage cover
Undertale: Fallen Angel cover
Chainsmoker [ Gaster!Sans x Reader ] cover
Undertale - Fighting To Stay [Frans] [Book 3] cover
He's Mine (COMPLETED)(Yandere Papyrus) cover
Determination (Sans X  Reader) cover
Sacrifices (Undertale FanFic) [COMPLETED] cover
Reset (Sans x Older!Frisk) cover

× [Sickness] × || Undertale Fanstory || The Gasters/Skeleton Family

8 parts Complete

One day, Sans fell sick. His sickness came out of nowhere and it cannot be cured no matter how many medicines Gaster gave him. Because of the sickness, Sans stayed still on the bed, just laying down or sitting on it under the blanket. The sickness can be seen from his face, half of his white skull was a little bit darker than the rest. Gaster and Papyrus had no idea what kind of illness Sans has, but they decided to take care of him no matter what, hoping that the sickness will soon gone either because of the medicines Gaster gave him, or disappears itself. But alas, The sickness gotten worse... -------- UNDERTALE (c) Toby Fox --------- This have nothing to do with Undertale's canon characters or story. This is just a fan story I made because the idea stuck in my head for a few while and I'd like to share it with all of you. So, enjoy!