There are a lot of complicated relationships in this episode and a fair amount of trouble between relatives but once you sort that out, it's an excellent episode to watch and even though the ending is fairly predictable, there is a lot of entertainment value too.
John Ransom is found murdered and it is immediately noted that there are strange looking scorch marks on his head. Barnaby and Scott learn that Ransom was a test subject for his brother, Max, who was conducting experiments into second sight, a gift supposedly shared by several in the village, including, obviously, possibly the dead man himself.
More enquiries reveal that John Ransom was also having problems with his brother-in-law, Ben Kirby over an upcoming Baptism which was causing major rifts within the family. The question is, were the experiments or the family squabbles connected to the death and who, if anyone actually has the gift of second sight? Watch and see!