He began his career on stage in productions such as Teechers, The Government Inspector, The Picture of Dorian Gray and All Quiet on the Western Front, before joining the cast of the BBC legal drama Showtrial (2021).

[1][2] Castle-Doughty studied English, Theatre and History at Dulwich College in South London, graduating in 2013 with three As.

[5][6] Castle-Doughty made his acting debut in 2011 in a stage production of Teechers at the Edinburgh Festival Theatre.

Castle-Doughty continued to act in theatre productions, including lead roles in The Government Inspector, The Picture of Dorian Gray, The Net Kill and All Quiet on the Western Front.

[8] A year later, he portrayed the recurring role of Mikhael in the Netflix fantasy series Shadow and Bone.