
Acting
David Patrick O'Hara (born 9 July 1965) is a Scottish stage and character actor. A graduate of the Royal Central School of Speech and Drama in London, he is best known to audiences for his numerous supporting roles in high-profile films; including Irishman Stephen in Braveheart, dimwitted mobster Fitzy in The Departed, hitman Mr. X in Wanted, and Albert Runcorn in Harry Potter and the Deathly Hallows – Part 1. He portrayed Det. Danny 'Mac' McGregor on The District, and Henry Howard, Earl of Surrey on The Tudors.
Description above from the Wikipedia article David O'Hara, licensed under CC-BY-S…

Horizon: An American Saga - Chapter 1
as Bowler Hat Surveyor

Horizon: An American Saga - Chapter 2

Deus
as Ulph

The Sparrow
as Larry

Santana

Stan the Man
as Old Timer

Cold Pursuit
as Gallum 'Sly' Ferrante

The Professor and the Madman
as Church

Dirt Road To Lafayette
as Tom

In Extremis
as Alex

Gotham
as Reggie Payne · 3 ep.

Marvel's Agents of S.H.I.E.L.D.
as Alistair Fitz · 3 ep.

Luther
as George Stark · 4 ep.

The Tudors
as Henry Howard · 20 ep.

The Commander
4 ep.

The District
as Danny MacGregor · 23 ep.

Trial & Retribution
2 ep.

The Tales of Para Handy
as Robert Grant · 1 ep.
Full Stretch
1 ep.

Prime Suspect
as DS Rankine · 1 ep.
Hotel Rwanda
2004