a bicycle again as he and Grace had done before they met the Doctor. The two men saw a vision of Grace smiling at them as they bonded. Appearances Television Graham O'Brien is introduced in the eleventh series premiere, "The Woman Who Fell to Earth" (2018). Graham is a retired bus driver and is married to Grace. While travelling on a train in Sheffield, Graham and Grace are attacked by a strange creature, but are saved when the Doctor intervenes. Along with Grace's grandson Ryan Sinclair and PC Yasmin Khan, Graham helps the Doctor stop Tzim-Sha, an alien warrior on a rampage across Sheffield, but their victory costs Grace's life. After burying Grace, Graham joins Ryan and Yaz in helping to teleport the Doctor back to her missing spaceship, but they are inadvertently swept along with her. After their consequential adventure in "The Ghost Monument", the Doctor agrees to take Graham, Ryan and Yaz back to Earth. They eventually return to Sheffield in "Arachnids in the UK", and Graham wrestles with his grief as he begins seeing apparitions of Grace in their home. Eventually, he decides to travel with the Doctor properly as he works through his grief. As they travel together, Ryan – who has always rejected Graham as a grandfather figure – warms to him and their relationship improves. In "It Takes You Away", Graham is confronted by the apparent return of Grace while trapped in a mirror dimension. Despite the Doctor's pleas for Graham to recognise that Grace has been created by an alien force to tempt him away from the real world, he struggles to reject her; however, he comes to recognise her as an imposter when she is seemingly indifferent to the fact that Ryan was in peril. After they escape, Ryan calls Graham "Grandad" for the first time. In the series finale, "The Battle of Ranskoor Av Kolos", Graham is confronted by Tzim-Sha's return and vows to avenge Grace's death, despite the Doctor's threat that she won't travel with a killer. Graham does come face with Tzim-Sha, but with Ryan's help he instead apprehends him and locks him in a stasis chamber. Other media In September 2018, three Series 11 tie-in novels were announced, all of which feature Graham O’Brien – The Good Doctor, Molten Heart and Combat Magicks. Graham is depicted on the cover of The Good Doctor. Casting and development On 22