Mark O'Brien

Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).

Hannibal

Randall Tier

Warehouse 13

Jerry Hoffler

Nuremberg

Colonel John Amen

Halt and Catch Fire

Tom Rendon

Arrival

Captain Marks

Perry Mason

Thomas Milligan

Your Honor

Father Jay

Killjoys

Grayson Hicks

The Copenhagen Test

Edmund Cobb

Republic of Doyle

Des Courtney

City on a Hill

Jimmy Ryan

Ready or Not

Alex Le Domas

Marriage Story

Carter Mitchum

Bad Times at the El Royale

Larsen Rogers

The Sticky

Charlie

The Last Tycoon

Max Miner

61st Street

Officer Logan

The Darkest Minds

Rob Meadows

Falsehood

Elizeus Carrier

Kin

Jake

Anon

Cyrus Frear

How It Ends

Jeremiah

Shadow of God

Mason Harper

Quiet at Dawn

Watts

Parallel

Josh

The Front Runner

Billy Shore

Brad

Wanderer

Eric

Seven Veils

Paul

How to Plan an Orgy in a Small Town

Bruce Buck

Dennis

Blue Bayou

Ace

Hammer

Chris Davis

State Like Sleep

Darren

The Four Horsemen

Eric Rollins

Epilogue

Henry

The Righteous

Aaron Smith

The One That Got Away

Tommy Palchek

The Outer Threat

Better People

John

Goalie

Terry Sawchuk

Nice People

Grown Up Movie Star

Will

Snarbuckled

Jacob O'Higgins

The Dark Stranger

Mark

Beat Down

Michael

End of Days, Inc.

Jason

The Voices of Our Mother

William

Heartless Disappearance Into Labrador Seas