It's possible:
* The name is misspelled: Perhaps you're thinking of someone with a slightly different name. Could you double-check the spelling?
* The person is relatively unknown: There could be someone named Pat Hartigan who has worked on smaller projects or in a niche area.
* You're thinking of a different type of project: Maybe Pat Hartigan has been involved in theater productions, voice acting, or behind-the-scenes roles in film and television.
To help me find the correct person, please provide any additional information you have:
* What kind of projects are you interested in? (e.g., movies, television, theater, etc.)
* Do you know their approximate age or any other details about their career?
* Is there any other information you can share about them, like a specific character they played or a project they might have been involved in?
With more information, I'll be able to give you a more accurate answer!