* The name is misspelled or slightly different. It's worth checking for variations of the name on databases like IMDb.
* The individual might be more known in a specific region or genre. You could try looking for information about them in niche film communities or regional film archives.
* They might not be a well-known public figure. There could be many talented individuals who work behind the scenes or in smaller productions.
To help me find more information, could you provide me with more context?
* Do you have any other details about Roger Darton, like the type of project he's involved in (acting, directing, writing), or the approximate time period of his work?
* Is there a particular source where you saw his name mentioned?
With more information, I might be able to find the specific person you're looking for.