Kai Mattson is known for The Lost Bus (2025), Detrimental (2026) and Onslaught (2026).

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The Biggest Movies and TV Coming in September

"The Gentlemen" and "Slow Horses" return this fall, while the "Reacher" spin-off series "Neagley" makes its debut. See our guide of the biggest Fall TV and streaming releases.

2026 Fall TV and Streaming Watch Guide

&quot;The Gentlemen&quot; and &quot;Slow Horses&quot; return this fall, while the &quot;Reacher&quot; spin-off series &quot;Neagley&quot; makes its debut. See our guide of the biggest Fall TV and streaming releases.

Get a closer look at these actors from their many TV and streaming series roles.

Streaming Stars, Then and Now

Matthew McConaughey and America Ferrera in The Lost Bus (2025)

Jaydin Martinez, Shane Slone, Tevin Brown, Paris Maese, Brennan Cooper, Gabriel Mora, Tatiana O'Brien, Kiaunna Wales, and Kai Mattson in Detrimental (2026)

Geena Davis, Alfred Molina, Bill Pullman, Alfre Woodard, Denis O'Hare, and Clarke Peters in The Boroughs (2026)

Kai Mattson

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