This device uses sequential regression to return a TARDIS to the approximate location and time of the previous landing site. Travel using the Fast Return Switch is considerably less energy intensive than most other flights. Earlier landing sites can be reached by depressing the switch multiple times. A stuck Fast Return Switch will force a TARDIS to travel back in time until it collides with, and is destroyed by, the formation of a galaxy or even the entire universe. For this reason some models of the Fast Return control have a crystal which flashes to indicate when it is in operation.