What actors and actresses appeared in The Dover Road Mystery - 1960?

There doesn't appear to be a film or TV show called "The Dover Road Mystery" from 1960. There is, however, a 1934 film called "The Dover Road Mystery" starring:

* Edmund Gwenn

* Dame May Whitty

* Binnie Barnes

* Frank Lawton

It's possible you're thinking of a different film or TV show. Could you provide more details about the film you're looking for? Perhaps you remember a specific scene or character?