Thomas Philip O'Neill
Acting 11 credits
Biography
Thomas Philip O'Neill works in acting. Archytele lists 11 screen credits below. A full profile for this page is being written and will appear here once verified against sources.
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Frequent co-stars
Career timeline
Writer's Block
The School Duel
Endless Sea
Mapplethorpe
FBIFBI
MINDHUNTER
Black Mass
NCIS: New Orleans
Law & Order: Special Victims Unit
Law & Order
Full filmography
- Law & Order: Special Victims Unit (1999) as Rick Donnelly
- Law & Order (1990) as Dr. Neil Mosbach
- FBI (2018) as Neil Mosbach
- FBI (2018) as Dr. Neil Mosbach
- NCIS: New Orleans (2014) as Eddie Oberman
- MINDHUNTER (2017) as Leo Buchanan
- Black Mass (2015) as FBI Wire Tech
- Mapplethorpe (2019) as David Croland
- The School Duel (2024) as Pastor Mark
- Endless Sea (2022)
- Writer's Block (2025) as Matthew