My Little Pony: Adventures in Friendship, Vol. 5

Nocturnus and Galahad--father and son--were once partners in crimefighting. But that was before Nocturnus withdrew into the anonymity behind the mask and Galahad became a celebrity-millionaire. Now, with every one of their old enemies gathered together to destroy them, they have no choice but to team up for one last case. Collects issues #5-8.