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). Alexander is set to appear in the Scott Frank helmed series Dept. Q (2025).

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Kai Alexander and Saura Lightfoot-Leon in Masters of the Air and Part Three

Kai Alexander at event for 75th Primetime Emmy Awards

Kai Alexander at Masters of the Air - Los Angeles Premiere

Kai Alexander and Vincent Londez in Masters of the Air and Part Four

Sgt. William Quinn

Branden Cook, Nate Mann, Austin Butler, Callum Turner, Anthony Boyle, Ncuti Gatwa, and Josiah Cross in Masters of the Air (2024)

Teenage Lyle

Matthew Goode, Alexej Manvelov, and Leah Byrne in Dept. Q (2025)

Kai Alexander(II)

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