The series also introduces Bradley Walsh, Tosin Cole, and Mandip Gill as the Doctor's newest travelling companions, Graham O'Brien, Ryan Sinclair, and Yasmin Khan, respectively.

The series follows the Thirteenth Doctor as she initially searches for her lost TARDIS, inadvertently bringing Graham, Ryan, and Yasmin with her on her travels.

Chibnall had the final say on the actor, although the decision also involved Charlotte Moore and Piers Wenger, the director of content and head of drama for the BBC respectively.

[9][10] Consequently, the eleventh series introduced a new set of companions, including Bradley Walsh, Tosin Cole, and Mandip Gill as Graham O'Brien, Ryan Sinclair, and Yasmin Khan, respectively.

[18] In a "Coming Soon" vignette during the closing credits of the premiere episode, "The Woman Who Fell to Earth", a number of guest actors appearing in the remaining episodes of the series were shown: Mark Addy, Julie Hesmondhalgh, Shane Zaza, Shobna Gulati, Brett Goldstein, Josh Bowman, Siobhan Finneran, Lois Chimimba, Susan Lynch, Hamza Jeetooa (credited as Hamza Jeetoa), Art Malik, Suzanne Packer, Vinette Robinson, Amita Suman, Ben Bailey Smith, Phyllis Logan, and Chris Noth.

[19] Other appearances in the season included Kevin Eldon, Matthew Gravelle, Samuel Oatley, Trevor White, Leena Dhingra, and Jonny Dixon.

[22][23] With Moffat's departure from the role of head writer, he also stated in February 2017 that he was not planning to write in a regular capacity for the eleventh series.

Malorie Blackman, Ed Hime, Pete McTighe, Vinay Patel, and Joy Wilkinson all contributed scripts to the series.

This logo was designed by the creative agency Little Hawk, who also created a stylised insignia of the word "who" enclosed in a circle with an intersecting line.

In January 2018, the cast and crew flew abroad to Cape Town, South Africa, where they filmed the exterior shots for the second episode, "The Ghost Monument".

[54][55][56] Production blocks were arranged as follows:[31][57] A source that was linked to the social media platform Tapatalk, leaked unauthorized scenes and footage from the series to numerous websites and fan-based entities.

On 2 July, the BBC, through the representation of an American law firm, filed federal court papers in California and ordered a subpoena.

[58] It asked the United States Federal Court to compel Tapatalk to disclose records that could identify the source of the leak.

[60] On 26 June 2018, producer Chris Chibnall announced that the musical score for the eleventh series would be provided by Royal Birmingham Conservatoire alumnus Segun Akinola.

[64][4] Whittaker, Gill, Cole, Chibnall, and Strevens promoted the show with a panel at San Diego Comic-Con on 19 July 2018,[65] where the first trailer was released.

Nine-year-old Anna Mark, who suffers from cystic fibrosis, and her brother Alex visited the TARDIS and the Doctor Who set in Cardiff, meeting Gill, Cole, Walsh, and Whittaker during their tour.

The site's consensus reads "Carried by Jodie Whittaker's boundless energy and charm, Doctor Who's latest regeneration manages to feel fresh well into its 55-year tenure.

[106] Kaitlin Thomas of TV Guide praised Jodie Whittaker's "passion and fire", but felt the series was failing the companions; it "hasn't done much to develop them", and, "after four episodes, they're all still the same barely-there characters they were at the start".

[117] 40 further selected pieces of score from this series as composed by Segun Akinola, were released in a 2-CD set on 11 January 2019 by Silva Screen Records, including two tracks from the 2019 New Year's special "Resolution".