It's possible that:
* You're thinking of a different name. There might be a slight variation in the spelling, or you might be thinking of a different actor altogether.
* The actor is less well-known. There could be a lesser-known actor named Mark Straker who has appeared in smaller projects.
To help me give you a more accurate answer, could you provide more details? For example:
* Any additional information you remember about the actor: Like his appearance, any specific roles he played, or any other films or shows he might have been in.
* The type of projects you're looking for: Are you interested in movies, TV shows, or both?
With more information, I can help you find the actor you're looking for!