It's possible you're thinking of someone else, or there could be a lesser-known actor with that name.
To help me find the right person, could you provide me with more information? For example:
* Are you sure about the name? Is there any chance it's spelled differently or has a middle name?
* Do you remember any other details about him? For instance, the kind of roles he played, any specific movies or shows he was in, or his appearance?
With more information, I'll be able to help you find the right Timothy Martin.