Helen McCullough is known for Line of Duty (2012), Farr (2015) and Dalgliesh (2021).

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"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

Helen McCullough in The Clandestine (2012)

Adrian Dunbar, Vicky McClure, and Martin Compston in Line of Duty (2012)

Helen McCullough(I)

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