10 Saddest Doctor Who Companion Exits
9. Rose in Doomsday
To the relief of Peter Davison and his sons, Rose Tyler didn't die. Instead, she was separated from the Doctor when she became trapped in a parallel world. It was the natural conclusion for a Doctor and companion who had become inseparable. Their need to be together is what ultimately leads Rose to join the Doctor at the top of Torchwood's Canary Wharf office.
Rose isn't alone in this new universe, however. She has parallel Pete, the father she always wanted, and her mother Jackie. Finally, she has the family that she always wanted, but at the cost of her relationship with the Doctor. Rose has always neglected those close to her in pursuit of a life of adventure with the Doctor. So, stranding her in the alternative universe is arguably cruel, but it allows her to appreciate what really matters.
The lessons that she's learned from the Doctor and the support of her newfound family will ensure that she'll have a fantastic life. Just like the Ninth Doctor had wanted for her. Of course, this bittersweet ending is undone when she's eventually reunited with the Doctor, who palms off his half-human duplicate as her clone concubine.