The Doctor's Companions.
Amy Pond:
Amelia first met the Doctor at Easter in 1996 after his TARDIS crash-landed in her backyard. The Doctor offered to take her travelling with him, but first had keep the TARDIS' engines from phasing, requiring a quick trip into the future. The Doctor told Amelia he would only be five minutes, but he ended up taking twelve years. During the interim, Amelia became obsessed with her "Raggedy Doctor", creating dolls, comics and dress-up games around him, convincing her friend Rory into dressing up like him. Her Aunt Sharon sent her to four psychologists, whom she ended up biting after they tried to make her think the Doctor wasn't real. Reaching adulthood, Amelia took on the name "Amy", became engaged to Rory.
Rory Williams:
Whilst working as a nurse at Royal Leadworth Hospital, Rory witnessed the Doctor defeat Prisoner Zero and warn the Atraxi away from Earth. He later got engaged to Amy. Which Was His Ticket To Travelling With the Doctor in the TARDIS.
River Song:
River Song, previously a doctor and eventually a professor, was a mysterious archaeologist. She was also a convicted murderer who shared a close relationship with the Doctor. Significantly, she knew the Doctor's true name, which he would tell her at some point in his future. She would often greet him by saying "Hello, sweetie", whether in message or in person. She is A future Companion of the Doctor and keeps meeting him in the incorrect order, we do not know how she actually met the Doctor because of her being from the His Future.
