The boys who play Rupert and Angus are in real life the sons of the men who played them on Outlander.
The character Davina Porter is so named as an homage to the real-life Davina Porter, the prolific voice actor who narrated the Outlander book series for listening.
As a promotion for Outlander and Blood of My Blood Jamie Roy and Sam Heughan who play Brian and Jamie Fraser on the shows went to where they film Craig Na Dun to "pass the torch." At the end Sam Heughan asks for spoilers and if the stones are involved in Blood of My Blood and Jamie Roy answers him "Nice try son, nice try"
The actor playing Brian Fraser is named Jamie Roy. It also happens to be an alias that Brian's son Jamie uses in Outlander.
Prequel to Outlander revolving around Jamie Fraser and Claire Beauchamp Randall Fraser's parents.