Hallie Seline is known for Fellow Travelers (2023), Everything's Going to Be Great (2025) and DOS (2017).

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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

Fellow Travelers - Cousin Francis - Episode 2

Mayday - Nurse Frances Castledine - Season 13, Episode 1

Dorothy's Secret - Written & Directed by Matthew MacFadzean

Jonathan Bailey and Matt Bomer in Fellow Travelers (2023)

Allison Janney, Chris Cooper, Bryan Cranston, Jack Champion, and Benjamin Evan Ainsworth in Everything's Going to Be Great (2025)

Hallie Seline

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