Ryan Christiansen is known for American Sniper (2014), Dexter (2006) and The Oath (2018).

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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

Dexter - Scene with Michael C. Hall  1 of 3

Sean Bean, Ryan Kwanten, and Katrina Law in The Oath (2018)

Ryan Christiansen(I)

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