Mark Nielsen is known for Christopher Klagain Game of Thrones Audition (2014), Some Kind of Change (2015) and Kill the Teacher (2015).

Christopher Klagain Game of Thrones Audition

Second Unit Director or Assistant Director

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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

Christopher Klagain Game of Thrones Audition (2014)

Mark Nielsen(XI)

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Second Unit or Assistant Director

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