It's possible that:
* He is not a professional actor: He might be someone who is not involved in the entertainment industry at all.
* He has a different name: There could be a misspellings in the name, or he uses a different name professionally.
* He has a small, non-credited role: He may have a small role in a project that doesn't get listed in credits.
To find out more information, you could try:
* Searching for him on IMDb: Check the Internet Movie Database for any entries under the name "Rett Terrell".
* Searching social media: Look for his name on social media platforms like Facebook, Twitter, and Instagram.
Without further information, it's impossible to determine what movie and television projects he may have been involved in.