Biography
Kai Alexander is an actor, known for his role as Sgt. William Quinn in the miniseries Masters of the Air (2024) from Steven Spielberg, Tom Hanks and Gary Goetzman. He began his career with roles in award winning comedy series Catastrophe (2015) and the Harlan Coben thriller The Stranger (2020). He later went on to portray Richard Branson in Danny Boyle's Pistol (2022). In 2025 Alexander played Lyle Jennings in the Scott Frank helmed series Dept. Q (2025). He will next be seen in Anxious People (2026) alongside Angelina Jolie and Jason Segel, directed by Marc Forster.
Photos
EastEnders
Male Interviewee
1985 • 1 episode
Masters of the Air
Sgt. William Quinn
2024 • 5 episodes
Dept. Q
Teenage Lyle
2025 • 3 episodes
The Stranger
Dante Gunnarsson
2020 • 7 episodes
Pistol
Richard Branson
2022 • 1 episode
Original Drama Shorts
William
2014 • 1 episode
Angels in the Asylum
Jack
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Anxious People
2026
Wind of Change
Fautisch Drummer
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