Harry John Newman Treadaway (born 10 September 1984) is an English actor known for his performances as Victor Frankenstein in the horror-drama series Penny Dreadful and Brady Hartsfield in Audience's Mr. Mercedes.

National Theatre Live: The Grapes of Wrath
Tom Joad
2024

The Chemistry of Death
David Hunter · (6 episodes)
2023

Deceit
Keith Pedder · (4 episodes)
2021

Star Trek: Picard
Narek · (10 episodes)
2020

Gringo
Miles
2018

Mr. Mercedes
Brady Hartsfield · (20 episodes)
2017

The Crown
Roddy Llewellyn · (2 episodes)
2016

Lady Chatterley's Lover
Man who gives a hammer to Mellor at the game (uncredited)
2015

Honeymoon
Paul
2014

Penny Dreadful
Dr. Victor Frankenstein · (27 episodes)
2014

Fleming
Sub Lieutenant Hepworth · (4 episodes)
2014

Truckers
Glenn Davies · (5 episodes)
2013

The Lone Ranger
Frank
2013

Flight of the Storks
Jonathan Anselme · (2 episodes)
2013

Cockneys vs Zombies
Andy
2012

Hideaways
James Furlong
2011

Albatross
Jake
2011

The Night Watch
Duncan Pearce
2011

Pelican Blood
Nikko
2010

Fish Tank
Billy
2009

Digital Theatre - Over There
2009

The Shooting of Thomas Hurndall
Billy
2008

City of Ember
Doon Harrow
2008

The Disappeared
Matthew Ryan
2008

Love You More
Peter
2008

Control
Steve Morris
2007

Recovery
Dean Hamilton
2007

Brothers of the Head
Tom Howe
2006
Halo of Stars
Chicci

Meadowlands
(8 episodes)
2007

Afterlife
(1 episode)
2005

Agatha Christie's Marple
George Erskine · (1 episode)
2004