Thomas Philip O'Neill

Biography

Career Overview

Thomas Philip O'Neill has 11 screen credits in a career dating back to 1990. Signature works include The Mix, Writer's Block, Endless Sea. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.

Personal Facts

Known For

Acting

Gender

male

Known Credits

11

Known For

• 

  The Mix
• 

  Writer's Block
• 

  Endless Sea
• 

  The School Duel

Frequent Collaborators

• David Clark (1 collaborations)
• Shelby Flannery (1 collaborations)
• Elysia Roorbach (1 collaborations)
• Michael Spencer (1 collaborations)
• Éléonore Jeanne (1 collaborations)
• Brenda Cullerton (1 collaborations)
• Nora DeLigter (1 collaborations)
• Jacques Sebag (1 collaborations)
• Alexandra Templer (1 collaborations)
• Laila Ward (1 collaborations)

Credits

• actors (11 credits)

  • The Mix

    Sean Palermo

    actor

    actors
    2026
  • Writer's Block

    Matthew

    actor

    actors
    2025
  • The School Duel

    Pastor Mark

    actor

    actors
    2024
  • Endless Sea

    actor

    actors
    2022
  • Mapplethorpe

    David Croland

    actor

    actors
    2019
  • FBI

    - Fidelity (2026) ... Dr. Neil Mosbach actor actors

    - Behavior (2026) ... Dr. Neil Mosbach actor actors

    - Lone Wolf (1) (2025) ... Dr. Neil Mosbach actor actors

    - Falsetto (2025) ... Dr. Neil Mosbach actor actors

    - Manifest (2025) ... Dr. Neil Mosbach actor actors
    2018
  • MINDHUNTER

    - Episode 1 (2017) ... Leo Buchanan actor actors
    2017
  • Black Mass

    FBI Wire Tech

    actor

    actors
    2015
  • NCIS: New Orleans

    - Stashed (2021) ... Eddie Oberman actor actors
    2014
  • Law & Order: Special Victims Unit

    - Combat Fatigue (2024) ... Rick Donnelly actor actors
    1999
  • Law & Order

    - Remedies (2026) ... Dr. Neil Mosbach actor actors

    - The Enemy of All Women (2026) ... Dr. Neil Mosbach actor actors
    1990