Doctor Who is poised for an exhilarating fifteenth season, marking the return of Ncuti Gatwa as the iconic Time Lord. This season promises to be thrilling, with a fresh companion, an array of exciting guest stars, and creative adventures. As the series embarks on its second rebooted season, both long-time fans and new viewers can look forward to a captivating narrative.
This beloved series has a rich history of reinvention, having showcased numerous actors in the role of the Doctor since its inception in 1963. While opinions may differ on the best iteration, each version of the Doctor has contributed uniquely to the show’s legacy. As the fifteenth season unfolds, fans are sure to find something special in Gatwa’s portrayal.
Ncuti Gatwa as The Doctor
Date of Birth: 15 October 1992

- Active Since: 2014
Ncuti Gatwa, originally from Nyarugenge, Rwanda, relocated to Edinburgh, Scotland, in 1994. He gained widespread recognition for his role as Eric Effiong in the hit series Sex Education. Despite his previous work, it was this character that catapulted him to stardom. While filming for Greta Gerwig’s Barbie, Gatwa was selected to portray the Doctor, debuting in both the fourteenth and fifteenth seasons of Doctor Who.
Notable Movies & TV Shows:
Project Name | Character Name |
---|---|
Sex Education | Eric Effiong |
Barbie | Ken |
The Last Letter From Your Lover | Nick |
Masters of the Air | Lt. Robert H. Danies |
Varada Sethu as Belinda Chandra
Date of Birth: 12 May 1992

- Active Since: 2011
Varada Sethu, born in Kerala, India, has roots in Malayali ancestry. After relocating to North East England, she received her education at Dame Allan’s Schools and joined the National Youth Theater. Sethu rose to prominence with her role as PC Kylie Green in Doctors, subsequently appearing in notable projects like Now You See Me 2 and Doctor Foster.
Notable Movies & TV Shows:
Project Name | Character Name |
---|---|
Andor | Cinta Kaz |
Jurassic World: Dominion | Shira |
Now You See Me 2 | Tressler Assistant |
I Came By | Naz |
Character: In this season, the Doctor’s companion is Belinda Chandra, who embarks on thrilling time-traveling adventures. A distant relative of Mundy Flynn from the previous season, Belinda adds depth and intrigue to the Doctor’s journey.
Millie Gibson as Ruby Sunday
Date of Birth: 19 June 2004

- Active Since: 2017
Millie Gibson hails from Greater Manchester and studied at the Blue Coat School in Oldham. She first captured audiences in the children’s series Jamie Johnson and gained significant recognition for her role as Kelly Neelan in Coronation Street.
Notable Movies & TV Shows:
Project Name | Character Name |
---|---|
Coronation Street | Kelly Neelan |
Love, Lies & Records | Mia |
Jamie Johnson | Indira |
Butterfly | Lily Duffy |
Character: Ruby Sunday was introduced as the Doctor’s companion in the 2023 Christmas special “The Church on Ruby Road.”Although she faced the possibility of being written out following her initial season, it has been confirmed that Gibson will still appear as a recurring character this season, albeit with a reduced role to accommodate Belinda Chandra.
Jemma Redgrave as Kate Lethbridge-Stewart
Date of Birth 14th January 1965

- Active Since: 1988
Jemma Redgrave was born in London and is the daughter of esteemed actor Corin Redgrave. Her acting journey began on stage, where she showcased her talents in numerous high-profile roles during the ’80s and ’90s. Redgrave joined the Doctor Who family in its seventh season, portraying Kate Lethbridge-Stewart, a character with deep ties to the show’s lore.
Notable Movies & TV Shows:
Project Name | Character Name |
---|---|
The Beekeeper | President Danworth |
Howards End | Evie Wilcox |
I’ll Be There | Rebecca Edmonds |
Love & Friendship | Lady DeCourcy |
Character: As the head of the Unified Intelligence Task Force (U.N.I.T.), Kate Lethbridge-Stewart has aided the Doctor throughout countless adventures. As the daughter of the iconic Brigadier Alistair Gordon Lethbridge-Stewart from the classic era, Kate’s character continues to evolve, including a budding romance that could unfold in the new episodes.
Doctor Who Supporting Cast & Characters

Bonnie Langford as Mel Bush – This classic companion from Doctor Who returns to assist in the Doctor’s adventures, contributing her experience from her original stint alongside Colin Baker’s Sixth Doctor. Mel Bush now works with U.N.I.T. in support of Gatwa’s Doctor.
Anita Dobson as Mrs. Flood – The enigma surrounding Mrs. Flood deepens in the new season. Previously introduced as Ruby Sunday’s neighbor who intriguingly broke the fourth wall, Dobson’s character will return, with revelations about her identity expected to unfold.
Jonah Hauer-King as TBD – Known for his role in The Little Mermaid, Jonah Hauer-King has been cast in a significant but undisclosed role for the new season, adding to the anticipation as fans await more details.
Susan Twist as Susan Triad – After her appearances as an agent of Sutekh in past seasons, Susan Triad is set to return, further intertwining the Doctor’s narrative with the new Pantheon of Gods that showrunner Russell T. Davies is clearly invested in exploring.