Born: 1st May 1984
Episodes Broadcast: 2020, 2022

Sacha Dhawan was born in Bramhall, Cheshire and started acting at the age of twelve. In 1997, he won a lead role in the last two seasons of Out Of Sight, after which he appeared in City Central and The Last Train. Following the turn of the century, Dhawan had a recurring part in Weirdsister College. He was an original castmember of the hit stage play The History Boys; the ensuing international tour took him to Broadway, and he was also involved with the 2006 movie adaptation. Dhawan's other television work during the decade included Wired with his future Doctor Who castmate, Jodie Whittaker, as well as Paradox and the animated series Chuggington.

In 2010, Dhawan was cast in the American sitcom Outsourced, but it was cancelled after its first season. British projects included Five Days, The Deep and Last Tango In Halifax. He also had roles in the horror film Splintered and the Will Smith science-fiction movie After Earth. In 2013, Dhawan appeared in the docudrama An Adventure In Space And Time, about the early days of Doctor Who; he played the programme's very first director, Waris Hussein. The following year, he began an occasional association with Big Finish Productions when he could be heard in the Eighth Doctor audio adventure The Reviled. During the remainder of the decade, Dhawan had prominent roles on both sides of the Atlantic in shows like In The Club, 24: Live Another Day, Mr Selfridge and Iron Fist, as well as the movie The Lady In The Van with Maggie Smith. While making the 2017 telefilm The Boy With The Topknot, he began a relationship with co-star Anjli Mohindra, who had previously been a regular castmember of the Doctor Who spin-off series The Sarah Jane Adventures.

Matt Strevens, the producer of An Adventure In Space And Time, became an executive producer on Doctor Who with its 2018 season. He hoped to attract Dhawan to the programme, but the actor had to turn down a part in that year's Demons Of The Punjab because of a scheduling conflict. Fortuitously, this meant that Dhawan was able to accept the production team's next offer: to become the newest incarnation of the Doctor's Time Lord arch-nemesis, the Master, making him the first person of colour to play the role. He first vexed Whittaker's Thirteenth Doctor in Spyfall on New Year's Day 2020, and he subsequently helped the Cybermen defile the ruins of his home planet, Gallifrey, in the season finale, Ascension Of The Cybermen / The Timeless Children. Dhawan's final appearance as the Master came in Whittaker's 2022 swansong, The Power Of The Doctor, in which he also played a corrupted version of the Doctor herself. In the meantime, his other projects included The Great and Suspect.