Dimensional feedback is an energy phenomenon which can affect objects that travel outside of a normal timestream or dimensional space. This effect can interfere with the proper navigation of certain types of time travel technology.
The Doctor's TARDIS was affected by a dimensional feedback that caused it to be set off course from an intended destination in 1940s San Francisco. Instead, he exited the TARDIS, in the company of Amy Pond and Rory Williams, aboard the Federation starship USS Enterprise-D in the 24th century of another universe. (TNG - Assimilation² comic: "Issue 1")
External link[]
- Dimensional feedback article at Tardis Data Core, the Doctor Who wiki