Thomas Philip O'Neill

Thomas Philip O'Neill

Acting

Known for

Law & Order: Special Victims Unit

Law & Order: Special Victims Unit

1999

Black Mass

Black Mass

2015

MINDHUNTER

MINDHUNTER

2017

FBI

FBI

2018

Law & Order

Law & Order

1990

NCIS: New Orleans

NCIS: New Orleans

2014

Mapplethorpe

Mapplethorpe

2019

The School Duel

The School Duel

2024

Writer's Block

Writer's Block

2025

Endless Sea

Endless Sea

2022

Acting11

The Mix

The Mix

2026

Sean Palermo

Writer's Block

Writer's Block

2025

Matthew

The School Duel

The School Duel

2024

Pastor Mark

Endless Sea

Endless Sea

2022

Mapplethorpe

Mapplethorpe

2019

David Croland

FBI

FBI

2018

Neil Mosbach / Dr. Neil Mosbach

MINDHUNTER

MINDHUNTER

2017

Leo Buchanan

Black Mass

Black Mass

2015

FBI Wire Tech

NCIS: New Orleans

NCIS: New Orleans

2014

Eddie Oberman

Law & Order: Special Victims Unit

Law & Order: Special Victims Unit

1999

Rick Donnelly

Law & Order

Law & Order

1990

Dr. Neil Mosbach