Amelia Pond is introduced in the fifth series (2010), "The Eleventh Hour", as a seven-year-old Scottish girl living with only her aunt when the Doctor crashes into her front yard one night. She asks him to investigate an unusual crack in her wall, but he is interrupted by an alert from the TARDIS. He promises Amelia that he will return in five minutes but is inadvertently late by twelve years. In the intervening period, Amelia's family and friends believe the Doctor is just her imaginary friend.