Penelope Brooke Granger was a investigative journalist who was assigned by her editor to investigate alien sightings. During one of her investigations, Penelope ended up captured by the Dominators after finding a away into their spaceship and sent to be executed by the Quarks. After being saved by Twelfth Doctor, she aided him in defeated the Dominator invasion force. Impressed by her skills, and reminding him of an old friend of his, the Doctor invited her to join him in the TARDIS and beome his companion, to which she agreed. .