Watch Clip
![](http://image.pbs.org/video-assets/pzOh7OJ-asset-mezzanine-16x9-5Ygq2id.jpg?resize=410x)
Ultimate Grantchester Trivia
3m 22s
So, just how well do the stars of Grantchester really know the series? We put their knowledge to the ultimate test! #GrantchesterPBS