To find out if he has been in any productions, you might try these steps:
1. Check IMDb: Search for "Patrick Galligan" on IMDb.com. If he has been in any known projects, they will be listed there.
2. Use a search engine: Try searching for "Patrick Galligan actor" on Google or another search engine. You might find articles or websites mentioning his work.
3. Search for specific productions: If you remember the names of any specific movies or shows you think he might have been in, search for those projects online and see if his name appears in the cast lists.
If you still can't find information about his projects, it's possible he has not been in any publicly known productions.