The TARDIS malfunctions (again) and sends the Doctor to Aperture Science, where he quickly makes an enemy of the facility's resident AI and an ally of Chell. (Set during Portal 2). This is my first story on here! Probably going to be about 3-5 chapters.

The Doctor has appeared in Apperture Science and decides to listen to the Rusian Robot's orders. As if. The Doctor is trapped, Portals are everywhere, and Countries are in control of this mess! What will happen? Rated T for Mild swearing. TRIPLE CROSSOVER! Doctor Who x Portal x Hetalia: Axis Powers!

The 10th Doctor and Martha land in a strange place, in the middle of testing! GLaDOS takes it upon herself to remove them from the test and examine the Doctor closely, for science. contest inside

Wheatley has found someone else to talk to besides the Space Core.

the walls between universes once again allow the TARDIS to unwillingly shoot through them, however, this time the TARDIS breaks down in an underground testing facility known only as "Aperture Laboratories"

Universes collide when multiple lifts crash at the same time.The Question how do the heros an villians get home?and how will this madness affect one big Fan?

Nobody can travel with the Doctor for very long without something about him rubbing off on them. Doctor/TARDIS, sort of TARDIS/Wheatley if you squint. Massive spoilers for Portal 2, and for 6x04 "The Doctor's Wife".