At the Oak Apple fairgrounds, the sign at the gypsy fortune-teller's booth reads "Katina". When she goes into the booth, the man next to the booth addresses her as "Katrina".
When Grace Starkey ends her initial interview by driving away, she can be seen (and heard) accelerating briskly in the direction her car was already facing. But the only available exit in that direction is the lane leading into her yard, which is completely blocked by DCI Barnaby's car.